Well I have seven, but haven't had them a full year yet. So I'm still a bit new with them. I've found mine to have pretty variable personality's, though they are not too bad to deal with during the day. I do have a few who are so food aggressive that there is no safe time of day to stick an unprotected hand in the cage. One thing I have been finding, double check your hygrometer every couple months. Every digital I've tried so far has died in a year or less at the high humidity needed for these guys. I'm currently using a couple units that I move from cage to cage to double check things.