You can't go wrong with this one on Hulu. I seem to be perpetually re-watching it..always something I missed from the previous viewing.
Seems that some people are turned-off by the show because of its politics, especially with Alec Baldwin playing a key role. Heck, he plays a strong Republican working as CEO for a major corporation and he nails the role. Both sides of the political aisle take a hammering on the show.
The characters are great, the plots are funny, and there's quite a bit of good old-fashioned offensive humor. Tons of cameo appearances from a variety of people in the entertainment and political worlds. The last 2 seasons are definitely not the best, but they have their moments.