Some of them just have attitudes unfortunately. The only real way to tame her down is just to keep handling her, and if you're really concerned with being bitten (which I can definitely understand!) you can always wear gloves and long sleeved shirts. Also, it sounds like she's very insecure and skittish if she's constantly tail rattling. Just make sure you have nice tight hides for her, and when you go to pick her up try to move as slowly as possible so she doesn't feel quite as threatened.