The main reason we haven't created a bunch of subforums (for all boards, not just art), is because we aren't active enough yet. Inactive boards make forums look pretty bad, so we're keeping everything condensed for now. Sprite art is usually more popular, I agree, and it is also neater, but we don't have a lot of spriting going on here yet, probably not enough for a whole board. If it takes off a bit more, we would definitely look at expanding to a sub board though. :) Still open to other opinions though, if anyone would like to contribute!