While a lot of my deviations suddenly seem to have Prints enabled, it's not that I'm looking to sell them!
Rather, I'm trying to use the
My Prints display box (on Profile pages) as a sort of
Featured Deviations display box, since I don't intend on getting a Premium Subscription and stuff. Designating selected deviations as Prints allows me to showcase more of my deviations on my Profile page.

Character Bios:
Of late, I found it really helpful that when I encounter an OC, it is usually accompanied by a lengthy biography about personality, history, conflict, etc. It lets me understand the characters in the drawing.
So lately, I'm trying to put up short Character Biographies to explain the history of characters in my drawings, why they're behaving that way. I'm not sure if it's annoying or repetitive, but I tried to keep it short and relevant to the picture.