Well, while I don't think Gin is the villain behind everything thats going on(for the aformentioned, he's just TOO obvious), he's definatly not a good guy. He's a huge dick. Kind of like how Byakuya isn't really a villain. Just a jerk.

I'm gonna have to assume there's some kind of Hollow controlling events here. I mean, they're supposed to be the badguys in this show.