The thing is, we're not just going to add boards blindly and have them flop. If you want an anime board, we need to see that the users want one to. We won't make a board just because it'll please one or two people. We need to know if the other users are willing to engage in conversations about whatever the board idea is. We are small, yes, and that's why we don't have many boards.
Another thing that you have to understand, is if we create a board blindly, not only will it have a pretty decent sized chance at failing at our current state, but it will also stretch our content thinner. We already appear to be a dead board even though we get 100 or more posts a day. Stretching our content thinner will just make the place seem even more dead, and therefore, more unappealing to new users.