(Note: This is going to be a long explanation I am sorry, I tried to keep it as short as possible)
So glad you asked this question!!
I canât speak for everyone in the community, but in my case, it started off as a âlol what ifâ crackship, and then I fell into a deep rabbit hole I havenât crawled out of for nearly two years now.
After I started to dig deeper, rewatching the show, reading through TBOB and the wikis for THISISNOTAWEBSITE, I realized that Bill and Stan are actually incredibly similar.Â
There was already a thing floating around, the same coin theory from the early days of Gravity Falls where it was believed that Stan and Bill were the same person (or something along those lines).
People already noticed that Bill and Stan are potentially meant to be narrative parallels: they both like gold, theyâre conmen, they wear a suit, they have a similar (kinda inappropriate) knee slapping sense of humour, and so on. In TBOB, you can notice how Bill even twins Stanleyâs outfits, which makes you wonder: is is out of spite to mock him, or because he likes them too?Â
But what I like most is the energy in their dynamic that is present in the canon: Bill hates Stanley with such passion, itâs almost poetic.Â
To an extent, itâs because he can see his own flaws mirrored at him through Stanley. He tries so badly to make Ford believe they are alike when in reality he is a lot more like that âlesserâ twin if his. But on top of that, Bill is jealous of Stan, since in the end, Stanley out-witted and out-conned him, and still had a home and a family to return to, which is arguably the one thing Bill canât have.
Furthermore, if Bill doesnât consider Ford a threat to his intellect, praising his scientific genius, he doesnât feel very moved by him either. While he seemed to have something ongoing with Ford, their chemistry wasnât strong enough to sway him in any way.Â
Sure had a breakdown at OâSadleys and manufactured a fantasy of him and Ford sharing a karaoke night, but thatâs about it. Bill may be yearning for him and may wish he had something more with Ford, but he still views him as a pawn in the end. On the website especially he stays reserved when speaking about him, claiming he doesnât care (yes you do Bill, yes you do.)
On the other hand, he canât seem to shut up about Stanley, whom he severely underestimated and now hates with a vivid passion.Â
Iâm sorry, what do you mean you can barely say anything about Ford, but you know the confines of Stanleyâs mind, you know what he likes, what he fears, and on top of that you wrote a whole poem about him? Even in TBOB he crashes out in the end because he assumes Stan is the reason our âpsychic linkâ with him is weakeningâŚlike GIRL, who said anything about Stanley ?!
Aside from that triangleâs delusions, itâs clear that Stan is a worthy opponent for him in a battle of wits. Stanley can read through Bill easily and he doesnât take any of his crapâthis is shown as much in show as in TBOB and even in the material that didnât make it into the show itself. The best kind of enemy is the one that knows which buttons to push to keep it interesting, Bill and Stan would ragebait each other if put in a room together.
Their likeness of mind could easily have made them get along had they met much earlier. Under different circumstances, they really could have been good friends or partners in crime.
TL:DR: Hereâs a summary in a few points why they had ship potential:
-theyâre narrative parallels (lots of likeness)
-Bill is fricking obsessed with hating on Stan (and thatâs kinda gay if you ask me)
-they are worthy rivals in witsÂ
-enemies/rivals to lovers potential
-in a different world, if they became pals, they wouldâve been nearly unstoppableÂ
So like, the chemistry is thereâŚyou just need to look at it at a certain angle đ.