I was AmetfanA on pokerstars, which I think is really lame. Don't know why I chose it other than I'm a NY Mets fan and I decided to encase it with AA.
pokerGreg was also pretty lame. (I'm Greg and I play poker - how original).
I don't know why it took me so long to come up with pairinAces - a play on my last name of Pahren (pronounced similarly).
But I really like my Aced name of AcesPRN - sort of a triple meaning there.

As for others names, ballsinmouth made me crack up the first time I saw it.