Oddly enough, I'm not a big comedy film fan... largely because I've seen so much crap in the genre I used to work as translator of Hollywood movies/series for a TV station (i.e., I translated the scripts, later read by actors), and thus during that 4 year period I saw soooo many bad flicks I'm burnt out
Those few that are in my top list:
Some Like It Hot
The Great Race
Life Of Brian and, to lesser extent, Holy Grail movie
What Women Want
some Jim Carrey movies, I suppose. Liar Liar
There are many 70s and 80s French comedies I remember seeing in my teens and totally loving them, but I'm pretty sure noone would know them anyway.
I do love to sit with my kids and watch some latest cartoons - Shrek, Madagascar, Over The Hedge, Ice Age, Cars, etc. - the problem however is that we never agree when to laugh What's funny for them is not for me, and vice versa.