Man, there's way too many to choose from I couldn't pick a specific favourite.

-How High
-Friday
-Half Baked
-Cheech & Chong

Just to name a few...

I agree with Fiender about the ending of Half Baked though, I can't think of a less realistic ending when it comes to Stoners and their weed. You can be a Stoner and get as much pussy as a dude that doesn't smoke.

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- Mr. Kush

I forgot the greatest movie of all time, The Jerk! Steve Martin is a comedy genius, at least he was back in the day....

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"Religion is the opiate of the masses" - Karl Marx

about half baked, it wasn't just the ending that was lame, remeber about a 1/3 into the movie when Dave is dating that stupid cunt, she starts spewing all this DEA funded BS, about how shes glad her dad is in prison for selling weed, dunno who the director was? but WTF were they thinking when they wrote her in the script?

my fav stoner flicks I can think of
jerald & kummy go to white caslte
escape from guantanamo
cheech & chong nice dreams, next movie and up in smoke
supertroopers

lot of other movies I like too while stoned, that arn't neccisarly stonner flicks