Holly is such a unique soap character (almost un-soap in many ways), there really isn't a prototype of someone I can easily compare her to. She also felt so real to me, and Garrett played the part as realistically as possible. She felt like a lot of people I knew, and I identified strongly with certain aspects of the character.
To me, what's what made GL special for a long time - there were just these wonderfully complicated characters (female characters in particular) that were grounded in reality. That obviously withered away throughout the years, but it was good while it lasted.