Dr. Peter Venkman

With a personality like Venkman's, it's hard not to like him. He is the classic Bill Murray character: charismatic, funny, obnoxious, sarcastic, and cynical.
His "gameshow" persona is how he became everyone's favorite Ghostbuster.
It would be difficult to believe that he became a scientist for the academics. It seems that he might have done it to impress the ladies. His act around women is so transparent you can't help but laugh. It's a wonder that he ever gets a date.

"(Venkman turned out to be) more hipper and more verbal then the others -- more of a huckster, the salesman of the team -- someone who is weak on the technical side and probably didn't do all that well in school, but is smart enough to have hooked up with guys more intelligent than he is." said Harold Ramis, in "Making Ghostbusters".
His personality among the Ghostbusters is the fun-loving slacker. He doesn't do any of the "real" work, he finds his niche schmoozing clients and ripping on his co-workers. He exhibits grace under fire when cutting work tension with his hilarious one-liners.