Well Mick is my real name.

It started as my MySpace name. Ever notice how You type a celebrity's name in a MySpace search and ten pages on them inevitably come up? At most only one is the real deal. The others are obviously poseurs.
It's a joke among my friends.: I'm a bass player/songwriter/singer. Fame may have eluded me so far, but I'm a celebrity-in-my-own-mind.
..So I jokingly called my page "Mickactual" to let the masses know I'm the real actual Mick (as tho You'd get nine additional poseurs pretending to be me - ha!).

It's also a nod to the "GalacticaActual" name Edward James Olmos responds with on "Battlestar Galactica" when someone speaks directly to his character on the com/phone lines (I'm a fan of the show, so...).