How do you think House treated the original fellows differently in seasons 1-3 in respect or attitude or expectations of them? If you respond thank you!!
This is a surprisingly complicated question, so I'm going to answer it in parts. First of all: what are House's expectations? What does House look for in an employee?
This is in itself more complicated than it seems. On a basic level, it's pretty simple: he wants his team (any of his teams) to be competent, to have good ideas, and to argue with him. House is very clear: he doesn't like yes-men, he wants to be challenged, he enjoys being challenged. He wants new perspectives, not ass kissing. The show underlines this a lot: by proving how badly he does without a team in Alone, to his firings of Henry and Dr. Terzi in S4, to the way he decides to hire Taub largely based on Taub standing up to him in Ugly. But we also very, very much see this in S1-3 in respect to House's attitude and treatment of the OG3.
As for what else House looks for in an employee, this is actually a pretty obvious repeating pattern: House loves a misfit. An outcast. A broken person. It's really important to bear in mind that House views himself as an underdog. He's quite ableist and self-loathing; he views himself as an outcast. He in turn identifies and relates to marginalized people: his medical origin story is that of seeing and admiring a Japanese outcast who overcame his status by being right, with intelligence and skill. He hires Foreman because of his criminal record; Cameron because of her damage; Park because no one else wants her. House's ideal employee has a chip on their shoulder and something to prove.
With all this in mind? House's respect for, interest in, and expectations of Foreman, Cameron, and Chase differ wildly, but I think it all largely stems from these facts. House likes people who remind him of himself: House likes people with something to prove.
Foreman is the easiest, because we start the show on his first day of work and he's largely the "main character" of the OG3 for the first three seasons: he's our viewpoint character, the one with the most focus and the most episodes specifically about his and House's relationship. Foreman reminds House of himself, both implicitly and (by S3) explicitly, and we see that House very much encourages this: he asks Foreman's opinions ("do you like this patient?" in TB or Not TB; his questioning of Foreman in DNR in regards to his former boss), is interested in what makes Foreman tick, but also makes it clear that (to House) there is a "right" answer: he's pleased when Foreman picks House-ish approaches over "softer" ones. Look how pleased he is in DNR when Foreman takes a risk: "you should feel great," House tells him, even though the risk didn't pay off. This is repeated in House Training, an episode literally named after their dynamic, where House eggs on Foreman's risk taking to the point that a patient dies.
More than anyone, I think, House views Foreman as a protegee: he encourages him, pushes him, and holds him to higher standards than he does Chase and Cameron, which Foreman notices and is annoyed by at times. But he also praises Foreman far more than he does the others, as when House does push Foreman, Foreman always rises to the challenge (to House's delight). "You read the book," House says admiringly, after ordering Foreman to read a textbook in annoyance; "I am so glad you work here," he tells him in another episode. Again, House sees himself as an underdog, looked down on, with something to prove. Foreman is the closest of any of his fellows to embodying the same feeling, with the same stubborn desperation.
We see, too, that House respects Foreman, even if he can be harder on him due to higher expectations. Season two in particular has a whole string of episodes where House is out of ideas and Foreman steps in and takes over the entire case (Safe, for example): this is not something anyone else can or does get away with, but when it's Foreman, House largely lets himself be pushed.
As a useful point of contrast, let's look at Chase, House's least favorite of the three in the first seasons. I know this is a touchy subject for fandom, so let me make a disclaimer: House doesn't hate the guy. House wants his employees to be competent and capable, and Chase is very much that: if House didn't think he was a valuable part of the team he would have gotten fired much sooner. But when you compare their dynamic to House and Foreman's, it's... pretty striking.
Chase is the only one of the trio who House never praises or treats with particular respect or even particular expectations. Foreman and Cameron both have multiple episodes where House seeks them out to comfort or reassure them (albeit, since it's House, not always in productive ways): not Chase! In fact, the closest House comes is The Mistake, where he specifically doesn't say a word to Chase about his father and in Chase's words "hangs him out to dry." You can read this as something House intends as kind (I think it probably is), but it isn't helpful, and it certainly isn't half as proactive as House is with the other two.
House never pushes Chase or demands any sort of action from him, nor does House seek out Chase's opinion as he does Cameron and Foreman. At best, House sometimes will appreciate Chase's creative problem-solving (as he should!), but typically he'll phrase it as he does in Occam's Razor: why didn't you think of this sooner? (While you, again, could read this as House pushing/having expectations of Chase, it isn't ever paired with praise as it is Foreman.) In fact, House actually tends to criticize Chase more than the other two: there are several episodes where he assumes or accuses Chase of messing up a procedure, or sides with Foreman when he accuses Chase of a mistake.
And honestly, this makes sense. House likes underdogs and outcasts: Chase for all his baggage is still a good-looking, fit, white man with a Family Name; a literal nepotism hire. House likes argument and debate; Chase tends to be a suck-up. House likes hard workers eager to prove themselves: Chase is a hard worker, but nowhere near as driven and ambitious as Foreman and Cameron, and not all that interested in proving himself (and indeed, without much to prove). Chase tends to tolerate and absorb the perceptions of others without fighting them: Foreman, Cameron, and House are always fighting back.
We see, too, that House likes Chase more when Chase starts shedding this passive attitude. He's pleased as punch when Chase calls him out in The Jerk, and beyond. Sometimes I forget why I hired you, House tells him when Chase calls him out: this is the nicest thing House has ever said to him, but also fairly backhanded. Chase is someone who has so much potential: he's great at diagnostics, he's super perceptive, he's incredibly talented, but House never tries to nurture or improve these traits. He wishes Chase acted on them more, sure, but doesn't take an active interest in developing them.
Finally, Cameron is an interesting example. House pushes her a lot, but typically as part of a general push and pull where she pushes and demands just as much from him in return. House wants her to be more cynical and ruthless, but time and again defers to her moral calls and demands: he doesn't try to shape or train her as much as he does Foreman, but he takes a much greater interest in her personal life and feelings than he does anyone else.
Part of this is because Cameron's baggage and trauma is, of course, deeply personal and constantly manifesting itself: Foreman has a chip on his shoulder, but isn't defined by a single Event the way Cameron and House are. If House views Foreman as a protegee, a second, potentially improved version of himself, he seems to view Cameron as more similar to himself as he is now: damaged and withdrawn and afraid of reaching out and being hurt again. (Not for nothing does the show twice have episodes specifically paralleling this aspect of House and Cameron: Hunting and The Itch.) On a personal level, House takes a great interest and is deeply invested, but we don't see this as much on a medical/professional one: he doesn't push her to be a better doctor, just a more bold and ruthless one. He respects Cameron's medical opinion -- he doesn't accuse her of screwing up on a regular basis, cough Chase -- but it just isn't House's main attraction to her. Put another way: if Foreman is House's Ego, rational and driven, Cameron represents the Superego: morals and conscience. Or another way: House is drawn to Foreman's mind, but Cameron's "heart."
He respects her greatly, even if Cameron can very much annoy him at times, and seeks out or listens to her ethical/moral takes, but when House tries to push or shape her, it is only along these lines and not medically: it isn't her doctoring that he's interested in as much.
