Advice on finishing drawings?

Hey Kienan and fellow fans :) It's been a longstanding problem for me to finish drawings. To clarify what I mean, a "finished" drawing to me is one that has been drawn, painted, and refined until you feel it's completed. Sometimes I go months without finishing anything even though I draw nearly everyday.

I love to create things so the sketch is the most fun for me but after a few hours it takes to complete the sketch, I lose interest. I've tried taking breaks but I still lose interest regardless and it's only the rare sketches that I'm actually really proud of that make it to the finish line. I know practice will increase the frequency of drawings I'm proud of and thus the more I finish.

Even then though, after the sketch regardless of how proud I am of it, it's like I have to force myself to continue. Forcing myself also often leads to me omitting details I originally planned to have, sometimes even the entire background. (since it's that much more work I have to push myself through)

Does anyone have any suggestions to make my art process more fun and interesting so I can stay motivated to complete more artworks?

If it helps, this is my typical art process currently:

  1. Quickly sketch out some ideas until I find one I like
  2. Flesh out the idea some more then either continue or scrap it and start over
  3. Continue adding details and refining until I finish the sketch. My finished sketches usually look something like this http://i.imgur.com/syyDbPI.png (After I get to this point is when I usually lose interest in the drawing and don't have the strength to continue D:)
  4. Add in basic colors (well sometimes I do make it to this stage)
  5. Refine the lines or do line art on a new layer
  6. Color and shade the drawing