1. Arrested Development
.
.
.
.
.
.
.
.
2-4. No particular order - Always Sunny in Philadelphia, MASH, Cheers, Seinfeld
Concords, The Office, and 30 Rock are definitely growing on me and could potentially bump one of the older shows out of my memory banks. Arrested Development will always be #1. Smartest comedy of all time right there.