Here's the thing ( take this from a 35 year old guy who's been around).
Women, at least the ones WORTH having, don't judge be appearance.
I'm 5'11", 180 lbs ( varies between 140 and 200). I've had women who were 95 lb super-hotties to 250 lb farm-girls, in inverse perportion to my size at the time. Here's a few notes to think upon.
How does your object of desire look? Is she one of those super-model wantobes? If so, I'd say, back off now. This type of female is generally only out for themselves. If they hook up with a fatso ( And I'll tell you 160lbs is not fat dude) then they are holing up with you for security, and will cheat on you in a heartbeat, and dump you as soon as someone better comes along. Or, is she just nice looking? In which case, if she shows interest at all, she's a good one to try and catch.
My personal favorite type of woman ( and the type I married) is a girl with a pretty face who is somewhat chunky ( 150-180 lbs, figuring a hieght of 5'3" to 5'8"). The girls in this range will be loyal to you to a degree you will not believe, and won't cheat on you, ever, for fear of messing up a good thing. ANd as far as the sexual side goes, getting a girl who is not a super hottie pays of in the freakiness in the bedroom. ( My wife doesn't call me Master, and doesn't have the name Slave-girl, for nothing.) Of course though, you have to have a certain ammount of profincecy in the bedroom yourself, to keep any female. If you can't maintain at least a 6-to-1 ****** ratio ( 6 of hers to every one of yours) then you are in for a lot of dissapointment, and for me, it's at LEAST a 9-to-1 ratio.