What I want to talk about is fanon. The things fans come up with on their own. I'm not particularly interested in fanon that contradicts canon; that's just being an obstinate fan who ends up bitterly hating the source material. But those little details that people come up with to flesh out the universe, be it in meta or fiction or something else, that may or may not end up becoming generally accepted. nhpw brought this up the other day, about how in fic, you see a lot of "Sheridan is a god in bed." That's definitely a fanon thing. We (unfortunately) never learned on the show itself about his prowess, so that's an interpretation that was left up to the fans.
What fanon things do you accept yourself? Which ones do you hate? What's your own personal crazy fanon? Me, for instance, I like to imagine that Sheridan listened to classic rock growing up because that's what his great-granddad listened to - remember, "As my great-granddad would have said, 'cool'"? - and that when his parents were running around doing diplomat-y stuff, he stayed with relatives. He probably got shit for it at the Academy. But when he's in his office, late at night, doing boring paperwork, he just rocks out to "Carry On My Wayward Son" or something. Nothing in canon contradicts that, so I'm free to believe it as much as I want.
Also, when I imagine events S5 and later in my head, I can just pretend he doesn't have his stupid goatee and ugly brown hair; that is contradicted by canon, but since it's just in my head and I'm not doing fanart, I think it's okay.