I loved Teenage Mutant Ninja Turtles and Denver the Last Dinosaur when I was a kid, and I did like Power Rangers in its earlier days, but I never saw Robocop either. One series I would've liked to watch too was Dinosaucers.
Now for Power Rangers, my brother is the biggest fan of it all. He's got toys from the original series to today, and he's also hooked on the Japanese versions of the shows (which date back all the way to the mid-70s!).