Incognito (ie: when I'm playing an akward game/ when I'm out of shape and momentarily suck at the game/ when I feel like trolling about) my nickname is Xaero. Funnily enough, I didn't get it from Quake 3: Arena. One day I was in a need for such an incognito nickname and I bought this game Galactic Civilizations (epic game). Upon starting my first round of the game I noticed that my first home planet's name is Xaero. For some reason I read it outloud and it sounded cool, so I decided for it to become my 2nd evil self >
My actual nickname, Propkid, was chosen out of several ones that I had in mind and I was testing out. I came up with it by finding a name for my team role in one MMORPG where I basically pretended to be the most offensive character and attracted all of the enemy team's firepower. In fact I was a noob that didn't know how to play the game yet and my class was a survivor runner; usually before the enemy team realised who I am they were on their way to lose. That's the 'prop' part- acting as something I'm not. Kid is in there, because I was one back in those days.
I decided to stick to this one rather than the others because people shortened it nicely when talking to me. 'Proppy', 'prop' or, my favourite, 'pro' ;D