Firefly. Firefly. Firefly. Unfortunately, my very favorite show ever created didn't even last an entire season!

Here are some others that I watch every episode of...

Castle
Royal Pains
Vampire Diaries
So You Think You Can Dance
Dancing With the Stars

There are tons of older shows that I grew up on...

And, some shows I will watch if they're on and I have nothing else to do...

House
Family Guy
Aqua Teen Hunger Force (really, pretty much anything on Adult Swim)
Law and Order (SVU and Criminal Intent)