This was a great exercise, I recommend it.  These are both my drawings of Dr. Crusher from Star Trek TNG, both were done on the same day. I found myself trying to draw her from memory, I had watched an episode the night before and she is a character I remember from childhood. I was pretty sure I knew what she looked like and I was interested in seeing what I could and couldn’t remember. Then I looked up reference and drew again observing the details I missed the first time. The next time I do something like this I would like to try doing the memory drawing a few more times before looking up photos to see if I can remember more.