The omission of the one truly great show from this thread is painful. Hey Dude was a Nick masterpiece.
The hijinx on the dude ranch were never ending. Such great episodes such as Ted leaving for summer school, Ted coming back from summer school to find Kyle moving in on Brad, and Capture the Flag were highlights of early nineties TV.
And let's not forget the inclusion of some side-boob from future Mrs. Ben Stiller, in the lifeguard episode.
All praise to Nick's O-Zone which also include Fifteen (with future Waiting star, Ryan Reynolds), or Salute Your Shorts with future Mr. Rilo Kiley, and SK8TV with future Shaggy.