Doctor Who (currently 7 seasons), Grimm (currently 2 seasons), Dollhouse (older, 2 seasons), Terra Nova (canceled, 1 season), The Nine Lives of Chloe King (canceled, 1 season) are some of my favorites. I'm going to start watching Torchwood, Sherlock, and The Walking Dead eventually though2

I highly highly recommend Foyle's War (on Netflix), especially if you like Downton Abbey.

Big Bang Theory, Psych, Covert Affairs, Castle (my favorite!), and Raising Hope are some good ones.

Firefly for sure, Homicide: Life on The Streets (a cop show along the lines of Law and Order, though a little grittier I think), Buffy the Vampire Slayer, Dexter, Big Bang Theory, Friends (still watch this every night in reruns), Two and a Half Men (the episodes with Charlie), I used to love Remington Steele (show from the 80s with Pierce Brosnan), not sure how RS would hold up now.

I like reality t.v, Some of my favorite shows are Wife Swap/Celebrity Wife Swap, House Hunters, A Haunting, Cops, Las Vegas Jail house, Vegas Strip, The People's Court, America's Court with Judge Ross, We the people with Gloria Allred, Most all Judge shows

*cough* Seinfeld *cough*

Breaking Bad is a MUST WATCH. I've seen all 5 seasons and I'm anxiously waiting for the second half of season 5 to air!! Lost, White Collar, Suits, Weeds, Grey's Anatomy, Bones... are good options too.. but Breaking Bad first!! Oh, how can I forget my favorite show of all time - The Office. Hilarious!!!

Came back to add Gossip Girl. I'm hooked! 5 of the 6 seasons are on Netflix.

I'm EXTREMELY surprised no one has mentioned "Fringe" yet! It ended last month at season 5, and I am crying my eyes out. :'(
I'd recommend this series to EVERYONE, although it is more sci-fi. If you ever get the chance, WATCH THIS!!

Doctor Who (the new series, starting in 2005 with Christopher Eccleston)

Sherlock (the BBC version with Benedict Cumberbatch and Martin Freeman)

Supernatural

Hannibal

Rescue Me
Dexter
6 Feet Under
Californication
Glee