Same here really. I don't even find DH attractive when he is thin/loses lots of weight. He is 5 ft 10, and was 13 stone when I met him, so a fairly good weight for his height. (Not fat, not thin.) He had been a fat teenager, (16 stone,) and had lost weight and dropped to 11 stone, 2-3 years before I met him. As I say, he was 13 stone when I met him.
3-4 years after we met, he had gone up to 14 and a half stone (still not huge IMO,) and he went on a strict diet. He dropped to 10 stone in 6-7 months! He looked fucking dreadful. It aged him by 10 years, and he looked weirdly 'small...' Some people thought he was ill, and a colleague at work said he looks like someone who has been in hospital for six months and was in the early stages of recuperating.
His face looked gaunt, and his cheeks were sunken in, he looked pale, his skin looked grey, and he looked scrawny. I wasn't physically or sexually attracted to him at all, and kept making excuses to not have sex. He started to regain weight after about 6 months, and had put some 1.5 stone on after a couple of years. After 2 to 2.5 years, he, went back to about 13 and a half stone, and then sort of went between 13 and 14 stone for about 6-7 years.
He then dieted AGAIN, and dropped to 10 and a half stone this time. Once again, he looked gaunt and scrawny, and ill, and 10-12 years older than his age. One woman mistook him for my DAD when we went on a coach trip to Llandudno!
But yeah, I actually prefer him at 2-3 stone overweight, than 2-3 stone underweight. Just my preference. He has dieted on and off in the 35 years we have been together, but has been 13 stone or more for the past 15 years or so. (Thank goodness! I can't stand it when he's 'thin.')