I have a lust for art supplies that goes beyond their objective usefulness. It doesn't matter that I have six untouched canvases at home, if I walk past a display of canvases I want some. If it's of drawing pads I want drawing pads, even though I have several. I have a full set of pencils and more mechanical pencils than I could use but if I walk past a display I want some (The ones I bought today were totally justified. No, really - PenAgain is awesome
and I've been wanting ergonomic pencils ever since I found the pens. But that doesn't excuse lusting after pencils that are basically duplicates of ones I already have.) I've yet to get the hang of brush pens and never ink in anything but black, but when I saw a pack of 4 color Prismacolor brush pens I wanted them. Paints, pastels, markers, clay - hell, the cleaners
get me excited (no, I haven't been sniffing them). This made things even more difficult when I thought I might have to give up art, walking by an art store was like double torture. Now it's just trying to justify the expense. (I want more pan pastels. And the proper tool for them, since I somehow missed it when I bought the first batch.)
I'd worry, except a lot of people do this with things like fabric and yarn. My stash tendencies just extend to, uh, pretty much anything to do with art.
(Triggered by walking through Office Depot - looking for laminating pouches, something completely unrelated - and getting caught by their relatively small display of art supplies that was basically a shrine to Prismacolor.)