Dragnet - Changed and defined cop shows
24 - return of the serial, but on the tube, great idea
Get Smart - one of the funniest, best written shows ever
Star Trek TOS - The series that challenged society on so many levels
Band of Brothers - if this does not make war unthinkable, nothing will
Rome - historically lovely, delightful details in the costumes and the social mores of the time
Dexter - like in Dr. Strangelove, you root for the moral evil, showing that in reality nothing is black or white.
True Blood - sexy escapism, Twilight for adults
Six Feet Under - a bit of a soap opera, but it pushed the boundaries about relationships and what is or is not acceptable. Better than average acting for TV
Carnivale - just a fun little series.