Personally, the more interested in something I am, the harder it will be to get me a related gift I’ll be happy about. I’ve probably already got the more obvious stuff, and decent versions of them that I put a lot of thought into selecting.

That’s why I personally try to avoid interests and give gifts that are generally useful but less obvious. Things that people might have on a mental “that would be nice to have but I can’t be bothered right now” list.