Second Syndrome

I've notice a certain phenomenon. When the first try turns out pretty good, the second try does not.  As a juggler who likes doing passing patterns with other people, this happens all of the time.  It also seems to happen with me when I draw or paint.

I like how yesterday's potato turned out and I also really enjoyed the process.  Today's potato, not so much on either front.  My drawing makes the potato look way more concave than actuality.

All and all, that's okay.  I'm drawing again and I don't get how to build shape with cross hatching, so I guess it's practice, practice, practice, followed by patience, patience, patience.