I really do hope they one day allow us to keep different faces we've purchased. I'm not going to change any of mine right now, but what happens when they add more faces, and they're better than the current ones? We should at least be able to switch between the old one we bought and any new ones, without having to pay each time.
I mean, what if they come out with a parrot, or pelican, or hummingbird? Or more gender-specific faces? Maybe a Carebear or something Gonna feel like such a waste to just paint over the faces we already paid for.