The main things that would put me off someone are body odour, be it breath, feet or whatever and bad skin. By bad skin, I really mean zits etc. I once lived with someone who had psoriasis for two years, so that wasn't a deal breaker. If you love someone, some things are less important.
I remember years ago when I was in Aberdeen falling seriously in lust with this guy I had seen a few times in one of the bars there. I never actually spoke to him, cos I was a lot more shy in those days than I am now. He was tall, dark and broodingly handsome with a great body, tight buns and fit legs. I pointed him out to one of my friends who laughed and said, "Wait till you see him move." He did and I went right off him. This sexy hunk who I'd only ever seen leaning on the bar walked like a chimp; shoulders forward, arms hanging and swaying from side to side with every step. That just killed the attraction for me. Standing still, he had good posture, but when he walked... Uh-uh, not sexy at all.