Though it's become a bit ubiquitous, Pulp Fiction will always be near the top of my list. It never looks like a bitch and I never try to fsck it like a bitch.
The Big Lebowski. Abide!
Hitchhiker's Guide to the Galaxy. It must be Thursday. I never could get the hang of Thursdays.
Fight Club. I am Jack's smirking revenge.
Pineapple Express. This is like the apex of the vortex of joint engineering.
Sorry but I'm also going to list some close contenders to top 5:
Wedding Crashers, 50 First Dates, True Romance, Sin City, Kill Bill Vol 1 & 2, Fear and Loathing in Las Vegas, Ferris Bueller's Day off, The Breakfast Club, Drop Dead Fred. ... just off the top of my head. I loves me some movies but I'm fickle and forgetful.
If you wasn't married, and I wasn't married......and I wasn't offensively ugly I would marry you Blue. You have great taste in movies, you clearly like Muse so have good taste in music too and.....let's face it, you have a great set of knockers
I would add The Shawshank Redemption, Amelie, One Flew Over The Cuckoo's Nest, The Green Mile and Spirited Away off the top of my head.