My account name I've used across gaming and first was used on a gaming server for Warcraft 2 called Heat.net. The names that I wanted to use were always taken, so I wanted to create a new nickname to use that I would like. The name Booster, a la Mario RPG, was what I decided I would try next. Then that was taken. Just changed the name by one letter and made it Boaster. At the time, I don't know why, but it was a good name and felt right.
It's not that I toot my own horn. It's just a name. Although it's no surprise when I talk a little smack when I beat someone in a game under this name