Out of all the characters I've created, Jocelyn Stafford has to be one of my favorites. She's evolved a bit over the years, too - she started off as a rather one-dimensional bully, but that disappeared when I hit upon the idea to make her a bit more political, pulling for the Democratic party despite being raised in a staunchly Republican household. It helps to explain her rebellious attitude a bit better, I think.
Jocelyn's always been a rocker chick, though - her design was very heavily inspired by a girl I saw at the mall one day, whose bleach-blonde hair and fishnet stockings under black boots immediately screamed "cartoon character". Long-time fans of my work might notice that I've augmented her character design slightly; she now sports a scorpion tattoo on her left arm, to contrast the butterfly on her right. They represent the angry and sensitive sides of her personality, respectively, but she keeps the scorpion on the side closest to her heart because she's definitely more deeply rooted in the aggressive side. (But when she's alone with her boyfriend Steve, she's a pure romantic.)