Well, I can't remember what I watched when I was SUPER little, only vaguely - so I'll leave that out (I remember a show with a chick with glasses who read books).
So I have to say the Simpsons. My parents let us watch it from when we were like, 5.
Do you recall the very first tv show you watched regularly? Mine was Mister Rodger's Neighborhood. I can also think back to the tv show which my parent's watched alot-Three's Company.