There were more shows than that. Like Roundhouse, Clarissa Explains It All, The Adventures of Pete and Pete, Salute Your Shorts, Hey Dude!, and probably among others that would take me forever to list.
(This could actually get even more technical, as the "old Nickelodeon" could include the time it was known as Pinwheel. Depends on how old ya wanna go.)
I'm quite obviously a child of the 90's. Nickelodeon was on any television in my house pretty much all the time.
But oh, how I remember all these shows. Each and every one of them was great for some reason, mostly for the sense of nostalgia that comes whenever I think of them. Especially the shows that made up SNICK, the block of time on Saturday nights.
Amen for DVD releases and the Internet which somewhat helps me relive my childhood. Because I miss these shows for the quality of humor, the story lines, the way they were so innovative. I mean, the sketch shows like All That! and Roundhouse were like SNL for kids, and Roundhouse especially made use of imagination.