heh, it's usually Jack Burton for my Riggers, Ashley Campbell (Ash) or Snake Plisken for my sams, and Ed Greenwood for my mages.
But other popular choices are jack o'neil, jane cobb, Fox mulder, Micheal meyers, Kai allard-liao, Morgan Kell..... etc etc etc.
But thats just when I want to be lazy, i actually come up with names "off the cuff" that sound like real people rather easily.