Age: 56, apparently out of your demographic. I learned unix about 25 years ago (though I'm not 'root') but I've only had linux installed on my personal hardware for a little over a year.
Usage? Media, writing, web use. I still have a windows 7 partition on one laptop but it's feeling neglected. I don't need photoshop or some other such program for which there's no linux equivalent.
The only exception might be if I wanted to decrypt a dvd. There aren't any linux programs I know of that keep up with the newer decrytion standards as well as the windows ones. But I haven't needed that in a while anyway.