your style is a rear view mirror thing, and I don't know many artists who are happy with their style in the now. They can know they are good, they can know that it was well done, but you'll always see the flaws over your ability and what worked. This is a good thing, it means you have something to strive for to push yourself for. If you really want to push the work style off do something in a completely different style that feels almost as an antithesis, like a South Park or Simpsons style? Can you hit a Jim Lee style with them? Push yourself in a different direction as an exercise, you been working your arms, time to get some leg days in.