To be honest, I think PBall is pretty lame. Even though I converted it, I would rather not see it get more popular if Karma becomes popular. It's a map that doesn't fit in with AA at all, I really only converted it because it was a small map that seemed easy to do.
To be perfectly honest, a lot of maaps don't fit AA. Aimfun, aimbush, pball, glass kill house yeti's lair, shipment, and basically all the maap maps that ever get played. The more AA like maps (Pipeline, Terminal Conflict, Square, Urban SE, Breakout etc.) I don't see being played as much. I think people like the less AAish maps because they're a break from the usual AA. I'd love for more peopel to play the more AA liek maaps because some of them are just plain awesome.
As for the topic, Aztec and Ice would be cool.