At 9E (pre-merger at least) I'd guess about 5% of the CA's wore hats, and about 90% of those that did tended to be douches. There are some really great guys out there who wear the hat, but they are in the minority. I think I've only seen 1-2 FO's who wear the hat. One of them is quite odd (always wears sunglasses in the terminal, etc).