Not so much temperamental as flighty. They require patience. In my experience, they spook easier than mainlands. You have to handle them slowly and calmly. Fast movements can cause them to "run".
They are not usually bity at all unless it's the normal cage aggression/feeding response. I've noticed mine seem to dislike the hook and I have much better luck not using it to take them out. Mine are full size adults though and this can be tricky. Babies you just scoop up. Mine just need to be assured it isn't feeding time, then I use a towel to cover their head and slowly begin pulling them out.
They are very interesting. Not the easiest to handle as adults if you're standing up because they want to just go, but if I'm sitting down, I can cover the head a couple times to calm them and then they just sir there or slowly explore.
Not much different from mainlands once you figure them out. Same expressions. As long you handle them and earn their trust and respect from early on, you should never have a problem.