Will you be able to define what you mean when you say jensen's scene stealer? How does scene stealing work? I always thought of it as the same as screen presence, am I right?
No, screen presence create scenes, not steal them. The technical definition of a scene stealer is a character in a film or dramatic performance that dominates the audience’s attention, often through charisma, humor or powerful acting, thus “stealing the scene”.  The term usually applies to a supporting character like this imdb’s list of supporting actor that steal almost every the scene they’re inScene stealing is not the same as screen presence because (from a theater perspective) stealing a scene destroys every chance of presence for you and your fellow actors. It’s like that saying, “Some people tell jokes to make people laugh.  Others tell jokes to make people like them.“  That is the difference between screen presence and screen stealing.  Presence, by its very nature, does not steal scenes, it creates them.
Scene stealers believe they are fully in character and they don’t mean to steal scenes from the chorus or the lead, they just love acting!  But if you steal scenes every time, even when you’re offstage or in a chorus, that means it’s not the character, it’s you.  Characters don’t always want to be seen.  Actors do.
Sure it’s a huge rush to be on stage and you want to show the audience how much energy and thought you can give to a part and bringing it to life.  You give the character more and more, louder, and bolder, and bigger, and you assume that since you’re in character, it’s what the character should do.  It’s not.  The actors are using the character as a puppet for their ego, forcing them far beyond what the writer or directors intended.  This brings us to why most popular scene-stealing actors are usually not lead actors.  Because it’s selfish.  It’s called scene-stealing, not scene creating.Â
The best acting is the kind that draws people in, not the kind that is shoved down your throat.  Actors need to listen to what the character is saying, don’t tell your character what to do.  Acting is not about projection or presence, those are two of the basic tools, it’s not the goal.  The goal is honesty, earnestly, become someone else for the sake of the story.  What Jared did in “The End” is not scene-stealing, he became Lucifer for the sake of the story.
When I was a teenager acting on stage and the director said I was a scene stealer, I didn’t get it because I thought I was such hot shit.  Only much later I realized I was the worst actor I’ve ever met.  Ideally being a scene stealer is a great start to learning to act, you have the command of your body and voice and that means you have the tools to assist in honing your performance skill and improve your craft.  It also means you are thinking hard about what you’re doing, which shows you have the ability to be actively engaged in what is going on, and that’s a good thing.  Next ideal step is to seek assistance from others who might possibly have more experience of different views to help you improve, which is the MOST important thing of all. Â
I could tell that Jared has learned from Mark Sheppard and he’s talked about different techniques he used for each different character he played.  I’ve haven’t found any reports of Jensen talking about acting techniques other than he couldn’t use what he usually relied on when Jared is acting a different character, like soulless Sam.  This made me think that Jensen has the same acting technique as Denzel Washington.Â
One of the things I quickly learned as an actor is that other actors  can trap you into making them look like good actors.  Denzel Washington is a one-note actor but he appears to be a great actor, a force of nature because he gets other actors to do what he wants them to do.  It’s how Denzel avoids becoming a supporting actor that steal scenes and instead is a leading man who dominates the scene because he makes other actors want to make him happy that they’re going a good job.I tell my niece that there’s no prize for being an understanding “cool” girlfriend who does everything to make the boyfriend happy while he does whatever he wants.  It’s the same with acting in a scene with your costar, you have to hold your own and that can create conflict, which sometimes end up looking like sexual tension to the audience. Â
If I sound critical of scene stealers I’m trying not to be because a good actor who steals scene can improve the scene by 50% and they often do.  They elevate the character beyond the creator’s intention, as Jensen had done with Dean Winchester, especially in the first three seasons.
