I have watched the show pretty much since it began. Tonight's episode was actually a repeat. Due to the President's speech, I missed last week's episode because I recorded at the wrong time!
Without question, Sheldon is one of the funniest characters I've seen in a long time on TV and the actor, Jim Parsons, does a great job in that role. He has no concept of reality or emotion...everything in the world is strictly based on logic and logic only.
The show that comes on afterwards, How I Met Your Mother, is also pretty funny. Neil Patrick Harris' character, Barney, is a riot. He does a really good job with that character.