The first episode of the show had me thinking that this was going to be another "let's make fun of the geeks" show (and to some extent a sitcom has to make fun of its main characters). The redeeming feature of the show, though, is that it actually does respect the kind of things you might actually hear when geeks talk. For instance, from Episode 2:
Leonard: Do you wanna join us for Thai food and a Superman movie marathon?(See: IMBD for an extended quote, or you can watch the segment on YouTube)
Penny: Wow, a marathon, how many Superman movies are there?
Sheldon: You're kidding, right?
Penny: You know, I do like the one where Lois Lane falls from the helicopter and Superman swooshes down and catches her. Which one was that?
Leonard, Sheldon, Wolowitz: *One.*
[Raj holds up one finger]
Sheldon: You know that scene was rife with scientific inaccuracy?
Penny: Yes, I know men can't fly...
Sheldon: No, no, let's assume that they can... Lois Lane is falling, accelerating at an initial rate of 32 feet per second per second... Superman swoops down to save her by reaching out two arms of steel... Miss Lane, who is now traveling at approximately 120 miles an hour, hits them and is immediately sliced into three equal pieces.
Leonard: Unless Superman matches her speed and decelerates.
Sheldon: In what space, sir, in what space? She's two feet above the ground. Frankly, if he really loved her, he'd let her hit the pavement. It'd be a more merciful death.
Yes, as a geek I can critique that dialog: no self-respecting scientist would ever use imperial measurements instead of metric: Sheldon should have said 10 meters per second squared. Superman's arms are also too broad to neatly slice Miss Lane's body into parts. But I can't make even that critique and not add to the humor the show espouses about geeks. My big non-geek complaint about the show is that it has a laugh track. I don't like shows with laugh tracks, and to be honest, I didn't think this show needed one.
Yes, these men are all stereotypes, but the dialog is well-written and interesting. In fact, the dialog is perhaps a bit too well-written. One friend of mine said he couldn't watch the show because it made him uncomfortable, and some of the jokes hit very close to home.
In any case, the show has many laugh out loud moments, and in 22 minute segments is perfectly suited for a portable video device (I watched a lot of it while waiting at airports). The show probably wouldn't get anything out of high def. I enjoyed every episode, even the ones that made me (very very slightly) uncomfortable. If you can't stand the first episode, skip it and go right to the second one. Highly recommended, and I've already checked out Season Twofrom the library.