For the most part they are pretty laid back. My female is a bit cage defensive however once you have your hands on her she becomes completely placid. They put their food to growth in a ridiculous way. It is my theory that they are eating more birds and reptiles in the wild. Taking from my observation with my girl and the observations of other keepers of Papuans that I have talked to, they do not seem to digest high fat prey items very well. When fed birds their stool is solid and more digested. When given large fat rats their stool tends to be loose and not digested as well. This is just my theory so dont take it as gospel. As of right now my girl has eaten chicken of all types, quail reptilinks, guinea fowl reptilinks, and quail rabbit blend reptilinks.
As far as temperature is concerned they seem to like it on the cooler side unless they are digesting. I run her cage with a hot spot of about 85.5 deg f and a cool side of 77-80 deg f. The only time that I see her on her hot side is when she is digesting or at the tail end of her shed cycle. She soaks for about 24 hours once a month during her shed cycle. These snakes seem to use every bit of there environment. She burrows and climbs so I make sure she has all of that in her cage. Please let me know if you have any questions and I will update as I become a better student of the serpent.