I definitely spent so much of my time watching Nick that it wasn't even funny!
My favorite shows:
Out of Control (anyone remember that one?)
Legends of the Hidden Temple (I can't believe no one has mentioned that. I actually had a classmate who appeared on it)
Double Dare and What Would You Do
You Can't Do That On Television
Clarissa Explains It All
Hey Dude
Welcome Freshman
I find it interesting so many people mentioned Fifteen. I HATED it. Maybe I just was little too young for it at the time it was on, or something. I grew up in the Orlando area, so I always wanted to be the kid who got slimed on the Nickelodeon Studios tour. Never happened.