I enjoy all of the animal armatars, plus the ice-themed ones. Probably my favorite by far is the polar bear (Carlie is using it), and the one I am currently using.
7500 AP needed for the ice armatars. I'd like to get it too, but *sigh*, it's hard to get that many points without spamming, and I have no notion of even starting tot ry to spam now. I guess I'll just build up points then. I'm still wanting the 1000 AP armatars right now.