I'm thinking this will be quite a list, decided to go in the order I found and loved them, or at least as close to that as I can remember...
Dr Who (until the last few years of the run, at least)
The Goodies (best British comedy you won't ever find on dvd - at least, not uncut)
Happy Days (before it jumped the shark when the Fonz, er, jumped a shark on water- skis. This is where the phrase "jumped the shark" came from, dear god that was an awful episode)
Fawlty Towers
Blakes 7
Seeing Things (cool Canadian show about a precog journalist, just started rewatching it and it's held up nicely)
The Young Ones (there's still hardly a day goes by I think of a gag from this and laugh)
Yes Minister/Yes Prime Minister
The Man From U.N.C.L.E.
Danger Mouse
Degrassi Junior High/Degrassi High
Black Adder
Max Headroom (both the music video show and the later US sci-fi show - it was so far ahead of its time, it's still ahead of its time today, great cyberpunk from before the word existed)
Daria
The Prisoner (the single greatest mindfuck show ever- not the recent shitty remake, there are things you can't un-see)
The Avengers (the '60s incarnation, nothing to do with the comic)
Shelley (great UK comedy, like Waiting for Godot if it was one guy who was always unemployed)
Red Dwarf (first few series)
Moonlighting
Frontline (great Aussie media satire)
The Games (even greater Aussie satire)
Thirtysomething
Quantum Leap
Picket Fences
Babylon 5
Malcolm In The Middle
Spaced
Invader Zim
Alias (must get around to that last season lol)
Lexx
Coupling
Buffy/Angel
The League of Gentlemen (awesome UK comedy where 3 guys play about 40 characters,twisted and brilliant)
Firefly
Dollhouse (the best of the Whedon shows,imho also one of the best science fiction shows ever)
Scrubs (although I fell behind before it apparently derailed)
Pushing Daisies (although I never saw season 2 since I heard it ended up in the air)
Lost
Current stuff:
Dr Who (especially the last couple of seasons since Steven Moffat took over)
Being Erica
Community (bit scared that they can't possibly top season 2,we'll see)
The Big Bang Theory
Chuck (bit behind, going to wait for the next and final season to catch up, I think)
Breaking Bad
Mad Men
Psychoville (2 of the guys from League of Gentlemen)
The Walking Dead (nowhere near as good as the comic but still really good, except that last episode)
In spite of all that, I know I've forgotten quite a few - TV is a pretty big part of my life, apparently. Now I look at that list, I find it kind of amazing that I've ever left the house