Most of my life I had conflict-based dreams, dreams where others are just accepting crappy situations and I am trying to rally them to get things changed, to make it right. I know what comes from my childhood struggles to assert my gender and have it recognized.
The worst dream I ever had was just a few months post-op. I was 24 when I had surgery and had been seriously suicidal for a number of years. In the dream I woke up to find my body as it used to be, unchanged, and that the past few months had been just a dream. I woke up screaming, in a cold sweat, and shaking like a leaf! It was so upsetting that I did not get any more sleep that night but it never happened again.