Just the irrationality and pre-determined nature of some of the decision-making. The process can feel like a shell game at times. That being said, I think that we understand now what USCIS wants now and are able to provide this and still get approvals even if we have to battle frequent and rough requests for evidence along the way.
With respect to your work and the types of cases you handle.
What are your biggest challenges? Where do you struggle the most?