trunks: At the time, my favorite cartoon character.
I came up with it in... 97? 98? I don't know. It started with my Hotmail account, and just stuck.
FailedToFail, part of a line from Nirvana's 'You Know You're Right". That started on AIM, and it's the one I still use.
For games I use Tsubo. It was a random name I made for a WoW toon with the Taint, and I started using it on other servers.