There are only about 20% of females that are just so attractive that i get hot and bothered just looking at them. But I'd day 40% or so are good enough that I'd potentially date them if i liked them as a person.
In other words, 20% make me go "oh hot damn", and 40% make me go "sure, why not?".
It is a very high percentage to me. I find most women attractive, but once I meet them and get to know them, it goes down a lot. Personality is much more important to me than her looks. I am not just saying it to look cool.
80% they don't have to be gorgeous I see the cuteness in everyone. Except old woman sometimes I'll see mid age woman and think "wow" I bet back in her time she was a stunner. Then again I work in the oil industry which means I'm surrounded by tons of guys 3 weeks a month so any woman starts to look attractive after a while
I find a lot of people attractive in the sense that I know they aren't bad looking to me. However, I don't think they're attractive in a... wow, I really like that face type of way.
So, I find about 60-70% of guys attractive in a "You are not my type but your face is nice" way and about 10% in a "Whoa there good looking" way. It's really rare that I look at a guy and am struck by his face and feel something.
It varies and a lot of my attraction to someone revolves around their personality. I've felt initial attraction to guys but as soon as I realized they had a horrible personality, I didn't find them attractive anymore.
I've also found guys who weren't that attractive initially, even more attractive once I got to know their personality more.
Not so much if I account the people in the age range of 17 to 35 (really old people don't attract me), exclude all the gingers (sorry gingers) and the really short guys (5'6 and under) and then look what's still left then not so much.
Physically like umm 10 or less percent at first glance, sexually umm like 0.05 percent at first glance. Damn , do I sound snobby but sexual attraction at first sight is rare for a woman or just me I don't know.