I would never NOT date a guy because of his thinning hair...

It wouldn't make a difference to me as long as he's a nice guy in general. Thinning hair is no problem, and I agree with the poster above me, when guys' hair start to thin out a lot of them crop it off or shave it off & it's very sexy
As far as body hair is concerned, I've never given it any thought, people are different, some have more and some have less hair & far be it for me to make it a criteria for picking a guy

If I was to handpick the perfect guy I probably would pick someone with less hair than more, but in the long run it doesn't matter to me.

(There are women who love lotsa bodyhair on the guy and women who loves everything shaved off, so there's bound to be somebody for everyone

)