I'm for this on a general basis... when/if it is approved, I'd push for a limited number of categories, probably something below 10. I think the unlimited category field is a bad idea, just due to the fact that arguably every comic could eventually narrow itself down to such a small sub-sub-subset of categories that we'd have to give everyone an award.
An idea does occur to me - since this is the TWCL Award... we could always use the genre categories TWCL uses to define what awards we give. We might want to remove/combine a couple of them... but it's still a starting point. They (for those who don't venture much off the forum) are:
Fantasy, Furry, Gaming, Geeky, Manga, Mature, Quirky, Sci-Fi, Weird, Workplace, Genre-less
I know that this isn't the time or place to debate *which* categories we do, I'm just throwing this out as a possible comprimise as an idea for those deciding on whether they're for this or not.