"You don't know me!" might well be Vince Vaughn's Jerry Springer-esque response to the suggestion that his movie self almost always mirrors his real self. Yet he might also admit that it's hard for those familiar with his films to not be struck with a sense of character déjà vu with every new comedy he makes. (True, he's had a few dramatic roles like Psycho's Norman Bates, but comedy is clearly his bread and butter.) That alone might lead an audience to conjecture that there's a fine line between Vaughn's off- and on-set personality. Talk show and media interviews with the fast-witted, nimble-tongued funnyman seem like even more evidence of the similarities between the screen Vaughn and the private Vaughn -- but not entirely, of course. We don't know Vaughn. So why do some moviegoers think they do? A look at Vince's "real" vs. "reel" life might help make sense of the matter.

Vince in reel life

From Wedding Crashers to his latest The Dilemma, Vaughn's movie MO is no mystery.

Awkward comedy king – Whether he's the source of awkward situations, like relentless partier Ricky in Made and The Dilemma's well-intentioned home-wrecker Ronny, or thrust into them by circumstances beyond his character's control in Four Christmases or Couple's Retreat, awkward laughs are Vince's niche.

Fast and flip – His quips and their delivery are fast and flip whether he's spouting sardonic Wedding Crasher speeches, bitter Break-Up or Fred Claus zingers, or laughable lectures on how to be a swinging honey-magnet and why you're never too Old School to found a fraternity.

Man-boyish charm – The adolescent male attitude, the wise-ass one-liners, the funny-when-flustered bull smashing about in the china shop shtick, the obvious dodge-ball-underdog insecurity or cockiness that belies insecurity ... it's all part of Vaughn's familiar man-boyish film charm.

Nice guy – None of the above would work without the likable nice guy sincerity you come to expect from movie Vaughn -- even when it's buried beneath petty, wounded acts of breakup revenge.

Vince in real life

Vaughn's real-world interviews suggest the good guy and charming, quick man-boyish wit are all part of the real Vaughn deal. As far as his propensity for awkwardness, that's not so clear. Looking at the bigger picture of his actual love life -- his rumored womanizing, proposal and breakup with lovelorn celeb Jennifer Aniston and his recent marriage to Canadian real estate agent Kyla Weber and the birth of their new baby Locklyn -- it's possible (possible, but a stretch) to generalize and trace a parallel film-life path. Immature swinger stage: Swingers, Made, Anchorman, Wedding Crashers, Old School, etc. Breakup stage (Or ready for a serious relationship stage? Though this seemed to sadly foreshadow his real split with Aniston): The Break-Up. Ready for marriage stage (and its dilemmas and challenges): Four Christmases, Couples Retreat, The Dilemma.

But as I said before: we don't know Vince Vaughn -- at least not the true, behind-the screen Vince Vaughn. (Unless perhaps he starts telling all to Howard Stern like poor jilted David Arquette.) Movie Vaughn? I'd say we know him predictably well by now. Here's hoping he surprises us with a dramatic thriller or romance in the future. Then again, with Psycho's success in mind, perhaps it's best if he stays inside the comedy box.