After having two novels and a novelette edited by a professional editor, one thing has become clear: I'm a passive writer. I don't know why I'm passive, and I don't notice it until someone points it out. Once I know it's there, it can be easily fixed.
Being a passive writer is NOT a good thing. It distances the reader from the characters and makes them, well, passive instead of active. The action is hard to follow because, again, there is a distance there. There is also a lot of telling instead of showing. I've noticed I'm the worst at this when I write in first person. My goal is to be more attentive to this problem and correct it in the future.
Do you have a quirk/issue with your writing you are trying to correct?