Most people like The Big Bang Theory because of Sheldon. Yeah, he is fun, and most of the episodes are dedicated to him. But of course I like better Penny cuteness. Ok, Ok, looking to the four guys, a think I am more like Leonard, liking girls and not having the guts to invite them. But in the other hand, I think Raj Koothrappali is very, very cool.
I am quite behind in the available episodes/seasons, but I am looking forward for the next seasons.