Things we don't want: Paying too much for characters.
We had to warm up to the prospect of buying characters, but now we don't mind it.
Yet. If characters are more than five dollars apiece, THEN we might have a problem, especially if there's a really huge cast. If it all adds up to sixty dollars total, then that would be fine, but nothing more than that. Also, we don't want to only be able to play against characters that we own. That could be pretty boring, especially in the early weeks.