Here's one for favorite aeon, and
here's one for aeon with the best overdrive, and
here's yet another for favorite aeons.
You're only going to get the same responses over and over again. I don't know how you couldn't see them, especially if you searched. I searched, and they came right up. Your thread's somewhat pointless.
...but in light of its existance, I chose Bahamut, because he's the best all-around player.