I think categories may help out though, so i voted as such.

I prefer the idea of subjects, but may I suggest a little extra idea?

We keep One Spotlight forum, but this actual spotlight forum changes focus after a time, to spolight a different series. It could in fact not be an actually new series, just one that has been nominated and voted to be the spotlight. After a series time is up, then we draft the topics back to their most appropiate forums (is there a way to put them below topics orginally in their respective forum, that were updated more recently than them? I think it might do that automatically?

We could perhaps also have a couple different spotlights for Video Games and some other much loved subjects here. (Spotlight toyline! I vote for transformers!Speaking of which, there images of the protoform Optimus Prime and Starscream toys about...)

The suggestion made by KagatoTEG is one that I like because I've seen it used on another forum and it seemed to be moderately successful. They had one forum for an anime series that they would spotlight and once a month, the series would be changed. It seems that discussion over any one specific series loses steam quickly as time goes on, so refreshing the subject should help stimulate discussion on a regular basis. Although it might not work with series that are not very well known.