Every year, I wind up pretty much not answering it.
In general, I'm a fairly difficult guy to buy stuff for. If I come up needing something, I usually go out and get it - which cuts down on the number of things others can get for me. In addition, the stuff I enjoy doing is pretty esoteric, which cuts down even more on what I can ask for.
All of this conspires to give my relatives a bit of trouble. I wish I could help out more, but I just don't know how.