Whilst we're on a role...
List them, and why you like them (or find interesting/unique)
Lost - I was suckered into Lost from the first episode. Yeah, it dragged around the 4th or 5th series. Although I saw it through to the end, the first couple of series were what I found good, the way they presented a character, and then kept finding more and more (slowly) about their history, and inter relationships. The very last episode made you think about the journey you had been on over the 8yrs (I think) it was screened. The episode that really pulled it all together for me was the back stories of Jacob and his brother.
24 - Mindless action. Just when one poor sod has suffered enough, a new episiode starts. One of the few American action series that kept my interest.
Dukes of Hazzard - essential watching for a lad of my age at the time. I was even too young to notice Daisy Duke

. Although borders on a comedy

.
For UK series, its mostly muder mystery...
Morse - an honest interpretation of the written works, played exceptionally well by John Thaw. Obviously set around an area I know well, which might have been the original draw for me. And I believe the Morse character and I share many similar traits and flaws. Shame I don't share his brains

Jonathan Creek - At the time (they are one shot watches), clever ways of doing the impossible.
Midsomer - I managed to miss this first time around, but have seen them all now. Fairly standard setup for this genre.
Miss Marple - the Joan Hickson ones of course.