Favorite Painting

Possibly one of my favorite paintings I've done.
I started on the last day of 2014 and I just really wanted to paint with oils. So I took the scrap piece of wood and started literally slapping on paint while listening to music. I didn't have an idea in mind, I just wanted to paint and then I started to form stuff on the wood.
I love it but I still feel as if it is unfinished but can't figure out what should be added. I wonder if I'll ever return to it.