I've gotten tired of 24, so it's no longer a favorite.
My all time favorite is Criminal Minds - just got the First Season DVD set, since I didn't get into until the 3rd season.
Then I like Fringe, Eleventh Hour, The Mentalist, House, Survivor, Lost, John and Kate Plus Eight, No Reservations
Love watching LifeTime movies on Sundays, and I like most of the News Magazine shows.
I'm very sad that they took Moonlight (the vampire series) off the air - he was a sexy vampire!