lots of guys focus on things like thinning hair, height, not having a square jaw, poor teeth etc etc, generally stuff you cant do much about.
of course women would prefer the perfect specimen, full head of thick dark hair, 6' plus, square jaw and yes these guys will bang more women simply because of these attributes but even some of these guys struggle with women.
part of the problem as I see it is that a lot of guys seem to want to be able to pick up ANY woman like there is some kind of magic formula, 'if only I had XYZ i could get any woman' well you cant!
look around when you are next out at a bar, club...whatever! how many of say the 30, 40 or more women would you bang? the immdiate answer is lots, but then you look round (at least I do) and have a bit of a closer inspection, usually I wittle it down to around 3-4 %! and thats before I even speak to them. maybe Im just picky, but so are women, to cite thinning hair is one thing, I have thinning hair and yes it makes a difference, but so do lots of other things.
if youre that worried, get hair transplants or just say Fck it and roll with it.
one thing that does turn women off as much as thinning hair is snivveling