Why do we treat "hackers" as some sort of mythical beasts who belong to a whole different race altogether? Now, I'm not saying you're doing that, but this is something I've observed quite a lot. Especially with those "X for Hackers" etc..

Answering your question — it differs from person to person. I personally wouldn't be interested in receiving a new router, for example, but I do know people who would. I'd like a typewriter more, to be honest. But that's just me.

Lastly, a good gift is one that comes with sincerity. It doesn't matter what it is, as long as its sender sends along warm wishes and sincere affection.