I've been watching tons of 30 Rock season 1 & 2 over the last few days. Why is it so good? I just watched the episode where Tracy starts making his porn video game and it turns into a parody of Amadeus. I feel like I'm going to die laughing every time I see it.
The show mixes high and lowbrow so well. Most of the supporting characters are brilliant (Dr. Spaceman, Will Arnett's cameos, Kenneth, I could do this all day) and the lead work is the best in comedy.
Seriously, if you aren't watching 30 Rock please do. From what I hear it has awful ratings but at least it seems like NBC really supports it (despite waiting so long for the premiere after all those Emmy wins, that just seemed stupid. Yeah, I know, American just can't get enough Kath & Kim).