How can people not like the Hangover? Honestly, come on people. For me I would rate all the movies people have been mentioning like this (I included my fav. Pineapple Express):
1. Knocked Up
2. Old School
3. Pineapple Express
4. The Hangover
5. 40 Year Old Virgin
6. Superbad (Super overrated)
7. Forgetting Sarah Marshall (I like Jason Segel, but I found this movie boring and too long)
Haven't seen Observe and Report yet, but it was only in theaters for like 2.5-3 weeks, so my expectations are super low.
And liamenator, how could you say The Hangover is on-par with Starsky and Hutch, that movie was barely funny. I am one of the few who liked the movie, and thought it was more of an action movie than comedy, because it wasn't funny. But I agree, the trailer ruined the movie, a lot of the big gags (tiger, tooth missing, hitting baby), are totally ruined by the trailor. The Hangover is way better than Starsky and Hutch.
I haven't seen the other movies you mentioned.
And I don't see why critics are hailing this as Bradley Cooper's coming out movie, I didn't think he was that good. The guy with the huge beard was way way way funnier, and I thought Ed Helms was better (but I am a huge Ed Helms fan).