She plays the Perfect Bitch..
Parkey Posey is the Quintessential Bitch.. Almost too easily.. And I don't mean this in a derogatory way While I have never met the Beautiful Parker in Person.. I bet her real personality is a cross between her Character in "Dazed and Confused" and "Best In Show"
Usually when see an Actor/Actresses play certain parts/personalities so naturally and effortlessly I always believe the real person must be similiar regarding personality.