I envy when I see other artists take their time with sketches, because I don't at all anymore lol! Often it's still detailed as it's what's in my head, but it's fast, messy and heavily revised once on computer. There is an odd quark I have of hating to waste paper. This likely is because until even eighteen I had notebook paper or preferably computer paper to work on. Never had the money until I started working to get art book and supplies.