Currently, I've been enjoying The Vikings series on the History Channel.
I like a lot of history stuff. When we moved here to DC area a couple years ago, I got into all the war stuff on the Military channel because we didn't have the channel in FL. I would have it on while we were going to sleep. One day, the wife says, "can we watch something else? I'm having dreams that we're being attacked by Nazi's." I had to laugh as I myself had a dream of the exact same thing the night before.
I'm also trying to give the new Bates Motel a try. The first episode last night was okay, but it needs to get better soon or I won't be long for it.
The Simpsons and The Office are series we have even on DVD. But the Office has gone down hill since Steve Carrel's departure.
The Big Bang Theory is great. Didn't realize that Sheldon is 40. He did an interview just the other night on Kimmel or Letterman...they talked about the writing on the show. They have science consultants and a regular guy who directs all the science stuff. Pretty good interview.
Right now my favorite show is Duck Dynasty, but I guess that is a reality show, so I'll go to that thread.