I am quite a sitcom buff [I collect them] and I must say I like The Big Bang Theory. I always find the way people interpret sitcoms specifically, to be quite fascinating. They provoke all manner of opinion and interpretation. For example, some of the opinions expressed here in regards to aspects of the show [which others have agreed with] are entirely wrong to me.
For example:
1. Sheldon is a great guy. He is loyal & kind. He seems to rub some viewers completely the wrong way but he reminds me very much of someone I worked with who had very strong autism [specifically, Aspergers] and he definitely has strong OCD [and likely a multitude of other things...]. He certainly isn't the 'bad guy'...if anything he is Spock in a sitcom. [Condescending, 'no fun'...remind you of anyone?]
2. I also don't think the show is 'belittling' or 'laughing at' geeks. It is quite the opposite. While the male characters might be socially awkward [you can't seriously say the geek community doesn't have these people] they are also smart, compassionate, successful and they do get the girls/have fun. Have a look at the way TBBT portrays sports fans etc before you claim it is mocking geeks.
So yes, I like the show. I think it is the best U.S sitcom in years [which is saying very little to be honest] but it isn't without its issues. Which are:
1. Jim Parsons in particular, is carrying the show. Many of the others are replaceable/unspectacular. People just like Penny because she is likable and pretty...but she is just the sarcastic, pretty blonde which isn't hard to do.
2. Howard is a complete creep and he drives me nuts. Especially in the first two seasons. Penny punches him and, in another episode, alludes to his actions as being sex-offender-esque. I'm glad they toned him down later on.
3. It's funny...but it frequently isn't THAT funny either. As I said, good sitcom but it is clearly inferior to Frasier [for example].