While there's a momentary stall with the Tit-Fight Simulator and the Poll for who should be entered, I had an idea for figuring out a way to classify sexfighters, both male and female.
Personally, I find that a good way to think of it is divide things into eight headings; Gender (self-explanatory), Kinsey (where you rank on the Kinsey Scale), Finesse (how good you are at arousing another), Fortitude (how well you can control your own arousal), Stamina (how long you can keep going for), Likes (Things you enjoy), Dislikes (Things you don't enjoy), and Favorites (Things you pretty much love).
As an example I'll list myself;
Gender: Male
Kinsey: 1 (More of a 0.5, really)
Finesse: 3/5 (I'd rate myself as average)
Fortitude: 2/5 (Not a quick shot, but I can't stall for long)
Stamina: 5/5 (Give me a second and I'm ready to go again)
Likes: Deep-throat (Receiving)
Dislikes: Anal (Giving and especially receiving)
Favorites: Tit-fucks (The promise of one will get me from soft to hard in a literal heartbeat, receiving one would drop my fortitude down to a zero.)
I'd say that this is a pretty good generalization for factors to look for in sex-fights. I specially didn't add things like penis size, bust size, etc. because apart apart from smothering, likes/dislikes and similar, they don't factor in. Though feel free to correct me if I'm wrong. I just tried to make a simple method of measuring ones aptitude for sexfights, male or female.