That's another main difference between rat snakes (including corns) and BPs/boas: rat snakes are active hunters, whereas BPs/boas are ambush (sit & wait) types.
So that's where the "inquisitive" part comes in: I really enjoy seeing my snakes & having them look back at me all the time. And it often means they enjoy being
up in their branches & always on the "look-out" instead of hiding. They seem to be a bit more visually-oriented, and because they are more aware of our presence,
they are less spooked by our "intrusions".