I did the big ones: Transformers, GI Joe, MOTU, TMNT, and Star Wars. I had a few Super Powers and Secret Wars figures, but it was usually the villains from those lines-- Dr. Doom, Darkseid, and Brainiac.
I had most of the MOTU figures and I beat the living snot out of them. Good thing they were durable. After that, it was GI Joe and TMNT. GI Joe went all wacky in 1990, and that's when I got into TMNT hardcore, like every other nine-year-old. My brothers were into it too, and they stayed in after I got out, when those Turtles that looked like Trolls showed up.