Why do you chose to compose this way?
I'm by no means the norm, but I enjoy the realms of atonality more than I do tonality. In that vein I very freely compose in a serialist style quite often. And when I'm stuck for musical ideas, I sit down and create tone-rows to be saved for later. I think it's truer to me than other musics.
Do some people relax/enjoy listening to it?
I personally do. Nothing is more relaxing for me hearing Webern songs.
I even go so far as to try ti sing the melodies as they happen.