All of us have weaknesses. In writing these can be especially pernicious, as we may not even recognize them. What has been eating at me, however, is that I do recognize several of my weaknesses, but I have a hard time actually doing something about them.
I think my biggest weakness is 'tension and conflict'. I have a tendency to resolve things too easily when everyone knows we should be piling on the misery for our main characters instead. My story reads a bit too linearly. Why is this so hard to fix? Because this particular weakness cannot be solved simply. I cannot change a sentence here and add a paragraph there to make it all better. I would need to simply rewrite nearly the whole book to fix this problem, and I don't have the willpower to do that right now. I suppose I can put this one away and focus on the next book for now. Perhaps in the future I can return to The Shard with renewed energy and do the necessary hard work.