Hmm... I love a lot of movies (and a lot of different kinds of movies). I guess I'd have to say some of my favorites are:
The Ref, Pulp Fiction, Full Metal Jacket, Jerry Macguire, Dangerous Liasons, Clueless, Varsity Blues and Remember the Titans.... there's more but that's enough to list.
Favorite Christmas movie: White Christmas
Oh and I love both Harry Potter movies!