Hahaha, around a year back (I think ) started playing loads and loads of TF2.. 6-8 hours everyday. So kept my TF2 name..
PS: Sei is something I came up after using Sensei for some time (which means master ). But then lotsa jerks used to keep switching their name to Sensei for no reason and thus shortened it to Sei
Also, I switch to "Sei Baba" from time to time (especially when I don't shave for 3-4 days)
I was/am/will be a big fan of cartoons. And there was a show called "The Centurians" which had a character named Ace McCloud. He was the flyboy, a typical adrenalin charged dude.
This name has stuck as my alias for more than 15 years now...so you can say, I follow my childhood hero...