Let's see...
Absolutely Fabulous (full set)
The Avengers (1965-1967, the Emma Peel years)
Black Adder (full set)
Campion (two different sets)
Dark Angel (both seasons)
Family Guy (season 1)
Fawlty Towers (full set)
Firefly (full set)
The Greatest American Hero (season 1)
Harsh Realm (full set)
I, Claudius (full set)
Kung Fu (seasons 1-2)
Millennium (seasons 1-2)
Monk (seasons 1-2)
Monty Python's Flying Circus (full set)
The Mrs. Bradley Mysteries (full set, Diana Rigg as a 1920s woman solving mysteries)
Neverwhere (full set)
The New Avengers (1976-1977)
Poirot (two different sets)
The Prisoner (full set)
Sherlock Holmes (two different sets, Jeremy Brett as Holmes)
Plus, my sons have more anime sets than I can shake a stick at, but I have no idea which ones (they all seem pretty much the same to me).
Johnathan