I want to stop, but why?

The 75 day blind contour challenge has been easy and rewarding. The original challenge is to draw in ink for 75 days or 75 drawings. But I already draw in ink in my sketchbook and a lot more than one drawing a day. But I am not super familiar or confident with blind contours so I decided that 75 days of blind contour drawings in a single sketchbook would be my theme. My drawing has clearly improved from this exercise and I still enjoy doing them yet I realize that 75 days is a long time and I am not even halfway done. That fact is discouraging and tempts me to stop, but I am not going to stop. I can see myself looking through this themed sketchbook in the future when it is complete and that makes me keep going. What makes you keep going?

 a few days and journaling in the 75 day sketchbook. I use bits of washi tape to brighten up the pages since I am drawing in black ink throughout every page. 

a few days and journaling in the 75 day sketchbook. I use bits of washi tape to brighten up the pages since I am drawing in black ink throughout every page.