Winners are usually Males or sexually non-threatening women:
Kate = Ladette
Nadia = Transexual
Rachel = Childlike
Simple as that really
It is also usually a quieter member of a big group:
Anthony = Team Saskia
Pete = The Anti-Plastics led by Richard
Brian = The Family led by Ziggy and Carole
Rachel = BBlock led by Darnell, Kat and Rex