I'm 50/50, some good guys I like, some baddies I like better.
Baddies: Vader, the Borg, GLaDOS, Hal 9000.
Goodies: Leia, Korben Dallas from 5th Element, Quorra from Tron.
Stuff like that. In some movies, the baddies are definitely worth the fandom, in some the goodies are better.
Your mileage may vary...