One Crazy Summer, Better Off Dead, Caddyshack.
All time favorite is Spaceballs - came out my Freshman year in college. Funny story...guys on my floor didn't want to see it but the girls did so we went as a group. About 15 minutes into the movie, the pious christian girls were OMG'ing the movie wondering why they thought it would be good. They were hating the movie. All us guys were absolutely loving the movie. Talk about a 180 on a movie!!!