Live action is by far the biggest thread, followed by art & action games/beat-'em-ups. Comic books has its own thread. Some put manga in it, others put it in the "Zako" thread. Animation tends to show up in the "Zako" thread or occasionally get its own thread. A lot of the threads that get created are original content: text stories, art, roleplaying, etc. Here's what I'd do:
- Live action
- Video games & related art (or is "fan art" better?)
- Animation, anime & related art
- Comics, manga & artwork
The rest can probably continue to go into the Zako section.