Depends who I'm with, but I often show off its results. It's music, and as such it tends to help open social doors.
But I wouldn't share much about its technical aspects, except a limited amount with more technically-minded musicians I know. Some people would probably be interested in the fact that I created a multi-track recording system for less than $100, but very few would want to know how I did it. Even if they wanted one themselves, few would have the patience to replicate my work, and my method probably wouldn't work for them anyway.
As for my computer work, I don't talk about it much, as it gets very nerdy, but again I sometimes share my results. For example, if you complained about a movie you had in which the incidental music was so loud that it made it hard to hear the dialogue, I could tell you how to fix it, if I thought you were up to the task and willing to put in the time. But most people aren't, so at best I'd probably end up doing it for them. And to be fair, there may be better ways of solving some of the problems I solve. My solutions usually cost very little money but take a lot of time.
Most of my special interests happen to be about the process of getting useful, practical results that a quite a lot of people would probably also like to get. But my methods are very much tailored to myself, and my shoes wouldn't fit most people, so most of them wouldn't benefit from trying to copy me.