Season 1&2 are legendary. For some reason, Season 3 doesn't seem to keep my attention much. I chugged through disc 1 and haven't begun disc 2 yet.
Also: Season 3 is now completely Uncensored. I really prefer my cartoon F-bombs to be bleeped out (or riffed out with Metalocalypse). I practically cringe every time I hear The Monarch go on a tirade about Dr. Venture...it just doesn't feel right.