Rules are cool. :D
I'd say old school would be first or second gen of certain gaming consoles. (NES, SNES, Sega, Atari, MAYBE the early PS1 games...) Definitely NOT X-box. As for Anime, I agree with Jenn. Anything that's hand drawn. Though some things I consider old school like Wizards. That came out in the 70's and was one of the first computer generated animations. So I guess 95 and younger.
I feel as if MKR is Old School, but it came out in 98 i believe.