Nothing out of the ordinary.
Favorite drug movie: Blow. I love Johnny Depp and on top of that, it will forever hold a special place in my heart because of all the nights in college spent watching it with close friends and a nice bag of rocket fuel.
But, there's so many, depending on the occasion. A few I think are worth mentioning...
Biggest mindfuck: Fear & Loathing. Followed by Requiem for a Dream and Spun. I like movies that are so familiar in their feeling that even if you're not, you might as well be on the drug(s) yourself.
Best message: Traffic. Excellent flick. Too bad they just don't get it.
Funniest drug scene: Probably the opening of Super Troopers. Fucking classic.
Oldest stoner favorite: Gotta be Half-Baked. I've seen it so many times that I have it memorized. It's not in rotation right now for that very reason. But, it will always be a favorite. I also have a thing for Jay & Silent Bob Strike Back. While it's not really about drugs, if you're high and you watch it, you'll pee your pants laughing so hard. Or maybe it's just me. Either way, it cracks me up.
Newest stoner favorite: Harold & Kumar Go to White Castle. I'd heard it wasn't that good, so I put off watching it. But, whatever dipshit told me that was dead wrong. If you like stoner movies and you haven't seen it, please do yourself a favor and get it.