Foxy, I don't hate ginger & use it fresh in cooking - it's just that so many of the ginger things OH's family like seem sooo sweet to me - ginger wine, ginger beer, ginger cordial, crystallised ginger, stem ginger in syrup. . . I do quite like the very dark choc & ginger combo very occasionally - but couldn't eat more than 1 or 2 biscuits & just feel better avoiding sugar.
You've done amazingly well on the diet - well done!! I find the same with taste changing - when I first went mostly sugar-free my taste for it very quickly went, so that anything sweet then tasted horribly over-sweet & was repellent. Sleep deprivation can play havoc with blood sugar regulation so what you say makes sense.
I'm lucky never to have really liked milk choc or very sweet things that much - even as a kid I preferred dark choc, though then the only stuff was Bourneville, which was sweeter than the good dark stuff we can get now. Easter eggs used to sit in the cupboard unopened from one year to the next then got chucked out! Was an only child, so no competition from siblings & was always bought too many of them by kind relatives!
Doesn't bother me if OH eats sweet stuff - I don't feel deprived, though sometimes crave a lump of fruit cheesecake & really good very dark choc desserts can be tempting if we're out to eat for a special meal. That said, I do worry he eats rather a lot of sugar, as diabetes runs through his family like pink through a stick of rock.