We have corns that spend all their time hiding, and corns that are out a lot. I've found that if you stretch their feeding out a bit to 14 days or so, they are out cruising more. We don't breed, so we don't worry about keeping weight on-- our adults do fine on a 14 day schedule.
Some of my corns just seem to like being out. We have one, Valen, who is a ghost and he is ALWAYS out and seems to want to be held and to go to new places.