I've got mixed feelings about the Big Bang Theory. The main source of the jokes is one of the nerds, who's social awkwardness borders unto the autistic. That's grown pretty old. They've got some great gags and situations, but they also tend towards the cliche sitcom stories.
Parks and Recreations is funny, although you have to be able to watch Amy Poehler to enjoy it. Not my favourite comedy of this moment, but still fun to watch.
