For me, it was a girl who was variously on AW as Isabelle Shaw, Jessica Davies and Miss Jessica D. Sadly I think she stopped escorting about 18 months ago.
She was about 6ft tall in heels, willowy, toned body, shoulder length straight reddy brown hair (sometimes dyed towards blonde). Face which I think of as being classically Eastern European, slightly angular with high cheekbones. Model looks rather than girl next door.
She's the only WG who, on first sight, I found myself thinking "fuck me, she's absolutely gorgeous". Closest person I can think of looks wise is Maria Sharapova (in my eyes anyway).