I have 3 corns. The 2 babies are always active in the evening, strolling around thier viv's looking for an escape route(bungie cords keep that from happening). My adult Tiaga I never see unless I take her out of her hide. I think all snakes react differently and at different ages. I'm no expert by any means, just my own observations of my 3 darlings of different ages. Hope this helps a bit.
One other thing. One of my babies i VERY flighty when we hold her and we've had her since last october, she calms down after a minute or so, but always on the move when we hold her, the other baby we got last month and is calm as can be. So in the case of my snakes they definately are of different "personalities" as it were.