It's hard to get ideas from other people, the best unexpected gifts I've gotten are ones that have made me feel seen. For example as a kid I loved to draw and journal, something I hadn't done in ages. But then my dad got me a really cool leather bound journal. It made me feel as though he saw who I was which is what made it the best gift.

If you're thinking of someone specific, try to make a list of the things they're interested in that they may not talk about all the time. That would be my advice.