I chose Sebulba as my first 'nick' in 1999 just after the release of Star Wars I. The only game genre I played back then was racing, particularly NFSIISE, hence Sebulba was a suiting name. As an ode to my first screen name, I still call myself Sebulba when I'm playing racing games.
Otherwise it's always been 'Lokalaskurar', ever since 2002.