My brother is 28 and doesn't seem to have any real interests as far as I can tell. We don't massively get on. No issues, but just nothing in common - I see him once or twice a year and have a fairly distant relationship generally. I asked him for any ideas and he said "don't know". He works but lives at home with our parents still.
I've crocheted everyone else in the family something (a hat for my sister, gloves for my dad, etc - things I know will be appreciated) but have no idea what he might like or want to wear! I bought him a scarf for Christmas last year, among other things. Obviously I should make him something but what? A hat as well? I'd never want him to feel left out. At the same time I know I'll get a box of chocolates as I have for the last 10 years.
So far I have a sock giftset and a brand of personal care products that I know he likes, but it doesn't feel like enough.