This feels like some sort of confessional.
Here goes nuthin-

I don't watch shows. When the TV gets turned on, certain channels get cycled through and if nothing good is on, the TV gets turned off. Typically, the channels are Comedy Central, History, and Discovery. Very rarely will I venture out into any others.
That said, some of my favorites are
Dirty Jobs
Any Live Stand-up (if it's good)
Dimitri Martin
Tosh.0
Southpark/Family Guy/Adult Swim
Mythbusters
Daily Show/Colbert Report
Pawn Stars

My housemate is hooked on Sons of Anarchy, so I follow along with that, but it's not something I'd tune in to on my own.
I like shows like Modern Marvels and How It's Made, but I don't pay attention to 'the new season' or which are repeats- it's pretty much all new to me since I don't watch that much.

I think the concept of a 'reality show' is glorifying some real idiots these days. It saddens me to see how far down 'The History Channel' has fallen from the original intent. I laughed when I heard about their new show- Madhouse. I used to race dirt oval in the 80's and, yah, lots of drama in the pits with the rednecks.