I feel like i was pissed off at everything when i was in pain, but when i wasnt it was all good. You need a sense of humor to get through this. I had planned on going for 7. 5 but once i measured myself standing over 5'11 i decided it was time to stop. I am totally satisfied w/ that height and i was able to stop while my legs still felt good which im hoping will lead to a quicker recovery than most.
I know what you mean - it's so easy to get annoyed at stuff while you're in pain. Also, I've found that simply being disabled can make one irritable.
Good call stopping at 5'11"; I think that's a really good height. I'm still working on straightening so I have no standing/walking tips for you, but good luck and quick recovery!