Luna Lovegood. I love how she is herself and doesn't try to change who she is by what others say she should be.
I'm not really a fan, but I've read most of the books, and I'm going to agree with that.
in the movies, Hagrid is my favourite because he's so big and loud and jolly. i can't think of anyone i'd prefer from the books
that black dude who yells "WHERE DA WHITE WIMMEN AT?"