There's no one particular reason, I think, it's just yet another thing to show brand loyalty for. I'm fairly certain every single person has used or currently

There's no one particular reason, I think, it's just yet another thing to show brand loyalty for. I'm fairly certain every single person has used or currently uses an Intel powered machine, so choosing AMD has a bit of caché to it (ha ha get it), because you're supporting an underdog, and as it so happens, that underdog has been kicking Intel's butt as of late.