i'm with beatrice - i too tend to gravitate toward more depressing movies, which seems stupid. it's just that i get little from comedies (& definitely nothing from action flicks), & i feel like i want some substance when i'm watching a movie.
one of the most beautiful, touching movies i found is relatively unknown, & called "the fountain". if you have a couple minutes, check this preview out:
http://www.youtube.com/watch?v=wMn3g3NCX4Y
note: the background in most of the unusual scenes were created in a lab (petri dish), instead of on a computer. there are a lot of "regular" scenes in the movie (in other words, it's not all artsy odd stuff).