Are all rat snakes aggressive?

[Charis]

Husbandry is actually very conflicted on them, seems like half the keepers I know of keep them like Oreocryptophis, never above 82 degrees, and pretty humid, with some kind of humidity friendly substrate like peat moss, etc, to more like a standard North American colubrid, aspen or similar, heat spot of 82-88 degrees and most recommend a humid hide all the time. That last is how mine are set up. They were quite difficult to get established in captivity and many died while keepers figured them out. They have a huge range and some areas of it are humid and never get over the low 80s, other areas get into the 90s fairly regularly and are much more arid. My personal theory is that various keepers' success with them and the methods that worked for them, depended greatly on where the original wild caught stock was taken from. So if possible, I always recommend asking what the snake you are looking at is used to and continuing if that seems to be working for that person/snake.

My male was bought as a sub adult and is a different locality than my female. He is our second largest colubrid, tied with our adult Honduran, at around 6 feet. My female was a hatchling when we got her and is about 3 and a half to 4 feet long, she is as big or slightly smaller than most of my adult corn snakes. Neither of them have been bitey at any point, though the male is very food motivated and I'm always cautious with him. So far, he actually seems pretty good at telling the difference between human and prey though. No huge difference in temperament between them. I think the size difference is due to locality rather than gender as well. My male is a great eater, nothing puts him off his feed. The female has gone through a few fasts.

They do exhibit one behavior that is more consistent with Old World rats than New World rats. When they are nervous or scared, they want to wrap the last third of their body around something, an arm works really well, and will hold the rest of their body in a ready S shape away and unsupported. They are ready to flinch away or attack whatever scared them that way. It's important to let them get a good hold to get into that posture, otherwise they will freak out and flail all over. If allowed to hold the posture awhile, with nothing further scaring them, they will relax and go back to calmly exploring. Like all colubrids, they can be fast when they want to be but mine are generally pretty calm.
A plastic bin should work fine.