Mick Doohan is a fantastic MotoGP World Champion! I also happen to have characters named Michael and Miguel who are both called Mick. I like this because Mike is rather common and Mick reminds me of a fair dinkum Aussie.
Mick Ronson, guitarist of the Spiders from Mars, David Bowie's semi-fictional band to go with his album "The Rise and Fall of Ziggy Stardust and the Spiders from Mars."
"And now the dudes are linin' up, 'cause they hear we got swagga,
But we kick 'em to the curb unless they look like Mick Jagger".
-- Anonymous User 11/26/2011
Mick is also used in The Netherlands and Belgium (Flanders, to be specific), where it is also a short form for Michael. The Dutch popularity list for Mick on this website should be a further indication of that. [noted -ed]