I only do designs for myself. I tried freelancing, but hated not having full creative control and emailing back and forth with people who had no experience with designing, yet tried to tell me how to do my job. I much prefer working on things for my own posts only.
Man as long as you are enjoying something, I say go for it. You can never get enough of the things you love, don't ever let your chances to do those things slip away in favor of something that doesn't make you happy.
As for that engraving style, that is definitely interesting. I'm sure you could compile a large collection of photos you turned into engravings rather quickly.