BESM, or Big Eyes Small Mouths. I don't know why I liked the Tri-Stat system as much as I do, and I haven't played it in awhile, but the system was just so open to make any kind of tropey character you ever wanted to. It didn't have to be based in anime, which is what the system drew a lot of inspiration off of. An example would be that I created a Yatcha(or however it's spelled, it's been awhile, but the alien species from Predator)in one of the longer campaigns I was apart of.
It's just really flexible and terribly open to allow you to just whatever, yet there for all that openness, it doesn't let you go so crazy you end up being overpowered. In which case, something just as overpowered could be thrown at you.
Still, really really love that system. I miss playing it.