Item: William Petersen to appear in final CSI episode Thursday night/Dana Stevens, Slate

More Info: For those of you who haven't watched the (CSI), Gil (Grissom) is hardly the most obvious object of erotic longing; he's a gray-haired, slightly dumpy, middle-aged workaholic who probably smells faintly of formaldehyde, and whose social skills are inversely proportional to his forensic acumen. Whence the mystique? Why are so many people in love with Gil Grissom?

Question: Which CSI lead actor (William Petersen, Las Vegas; David Caruso, Miami; or Gary Sinise, New York) is your favorite?