Ari Meyers from "Kate and Allie"
Valerie Bertinelli from "One Day at a Time"
Tatyana Ali and Karyn Parsons from "The Fresh Prince of Bel Air" (a little later, but still)
Nicole Eggert from "Charles in Charge"
Josie Davis from "Charles in Charge" (ok, not so much then, but man, she is stunning now!)
Phoebe Cates from "Gremlins", "Fast Times at Ridgemont High", etc...
Danielle Fishel from "Boy Meets World"
Alyssa Milano from "Who's the Boss?", etc...
Staci Keanan and Christine Lakin from "Step By Step"
Michelle Thomas (who died when only 30...) from "Family Matters", "The Cosby Show", etc... Way too much woman for Steve Urkel!
Yasmine Bleeth from "Baywatch" looks a lot like a girl I know and had a big crush on for years.
And I didn't even include "Saved by the Bell" or "Student Bodies", where is was like 'who do I have a crush on this week?' :p