When I realized I could draw fairly accurate illustrations, everything became a subject. My first assignments in art class were to "draw what I see" from the drawings of other artists. But I quickly graduated to drawing from my own photographs, then from scenes found in newspapers and magazines and tv.
I sit in our living room and draw my own feet stretched out in front of me, or pose my hand in my lap. While attending a concert or church I reach for a pencil to sketch elements of the scene in the margin on the program (sorry, Pastor?). Indeed, every room I occupy seems to offer something to sketch, or remains in my mind as a future sketch.
Other artists tell me they have the same addiction. My addiction might be more acute due to fear of someday suddenly lose this capacity to draw, due to age-related degeneration of mind, or body. "Easy come, easy go" is not acceptable management option for this late-blooming gift. So, I call it "practice" rather than "addiction", and happily share the results with students and viewers. Adding 10 more drawings when posting this blog.