Oh! Drawings and paintings can be improved over and over again forever.
I leave most of my drawings clearly unfinished because:
A. lazy.
B. lazy.
C. it looks cool at least for me.
D. time to move on to another piece.
E: It's 1:00 AM and I see unicorns dancing around.

The work is never over until you say so.
So...

P.S. This one is Cute and doesn't look unfinished to me