What do I do

I came accross this question, 'what do you do?', inquired by a good friend of mine who, by the diverging routes of our respective professional lifes, I keep remote contact only. I realized there are as many good answers to that question as people potentially asking.

For me, to put it into right context, it is about a three generations journey along the lines of technology evolution, where I am an intermediate, transitional step.