Nope. I think they're incredibly dumb. I didn't even like the first one, I just liked the nude scene of Shannon Elizabeth for obvious reasons. I though the movie itself was dumb as hell. I generally hate those kinds of "comedies". I don't think it takes any skill whatsoever to present things like "guy drinks jizz in a beer cup" or "explosive diarrhea" and call it "comedy". Like you literally cannot aim any lower than those movies do.
I guess there's the old chestnut about "not being pretentious" and "knowing exactly who their audience is", but that's just enabling.
The funniest thing about the first movie was what happened when a bunch of friends and I went to go see it (we all took a vote, and I was outvoted, and I didn't want to go back home). When Allyson Hannigan's character said the line about sticking a flute up her pussy, some random guy in the audience jumped out of his seat, started screaming "Yeah! YEAH!" while jumping up and down pumping his fist in the air, and then ran out the side exit.
No joke, the theater cracked up way more at that than anything that had happened in the movie up to that point.
I'm in love with Hannigan, though, so at least that bit was kinda funny, just on account of it being so far against who she portrays herself as. I think that was the whole point.
I saw the second one on cable and didn't care for that one, either. Never saw any of the other ones. Back in the day, if the first one was on cable and I wanted a quick tug I'd flip to the Shannon Elizabeth scene, but otherwise no interest whatsoever.