With Thorn, it really depends on his mood. Sometimes he just doesn't feel like being messed with so he'll try and scramble away. Other times he's content to hang out with me as long as I want. And then there are cases like yesterday... I was sitting on the floor of the reptile room and he was hanging onto my chest/shoulder. Well, he saw the mealworm colony and decided to go for it. Which was of course impossible for him to get to. But he was too riled after he saw them so I had to put him back before I lost him under the racks!
He's at that adolescent age where they CAN get somewhat moody. So far, I haven't had a problem with it, but who knows? I've heard that adults are very chill and will hang out with you whenever/whereever.