Ruuz
I'm not exactly what one might call "in to" American comedies, and gross out humour/romantic comedies are pretty much at the bottom of even that list. For a movie that most certainly contains both those two things (the latter in especially heavy doses), I actually didn't mind Van Wilder that much. But it's all about context, if instead of comparing it to a list of similar things that I hate you compared it to, say, the entire history of cinema overall, then National Lampoon's Van Wilder is pretty bad.
One additional note, the friend of mine who I put this on for told me that the movie was from the era of "When Tara Reid was still hot". Now personally I've never found any iteration of her attractive, but it did make me have a parallel...