As for the others, I'll let my RYM reviews do the talking:
I know this film is hugely popular and is often called one of the greatest comedies of all time but I've never been a big fan. It has its moments but for the most part, the jokes are obvious and juvenile. I've never thought John Belushi was particularly funny but he could be okay if used well, like in "The Blues Brothers". But here, he's just a dumb, sloppy, loud party animal- not a particularly interesting character and for the most part, I feel like the film doesn't know what to do with him. If you really want some good college-themed comedy, watch the Simpsons episode "Homer Goes To College" instead.
Chevy and Rodney do the same tired ass shtick they always did, Murray seems to be doing an impression of post-sandbox Brian Wilson and oh yeah, there's a fake looking groundhog puppet that dances. In other words, the film is pretty much garbage and its reputation as one of the great comedy films is utterly perplexing.
There's Something About Mary.
Has its moments but I wish it had a better cast. Stiller, Dillon, Diaz- none of these people are funny! Which mostly explains why they all get their scenes stolen by a Yorkshire Terrier on speed.
Bill and Ted's Bogus Journey
Has a larger budget and more of a sense of purpose (bordering on being meta at times) than the first film. The jokes are mostly still lame and stupid but at least they've upped the creepiness factor and added aliens and evil robots, so...
Fairly skeletal plot (burglar takes couple hostage, turns out the couple are annoying and dysfunctional, hilarity ensues) buoyed by Spacey, Leary and Davis's performances. Entertaining if you don't mind cynical, mean-spirited comedy.
As silly and cartoony as one would expect from a film vehicle for Weird Al. Michael Richards's involvement makes perfect sense as well. If absurdity levels verging on complete and utter nonsense are your cuppa tea, pull up a seat and switch this thing on.