My room stays around 79-83 and I provide my bloods with a warm spot of 85. They hardly ever use it.
Op, they really are vocal as stated above. Mine huff, puff, and hiss at everything. When they are young they can be nippy. I think I have some pics of a few tags in my gallery. The bites are nothing but they do have some sharp teeth that will make you bleed a bit. Just stick to handling them and they will settle down fine and turn into huffy puffy puppy dogs. My big girl will lay with you all day if you let her.