My female phantom doesn't hide unless the male is being a dick, he will usually dip into a cave if I approach. I recently added a few more spots for him and have noticed and increase in his confidence.
The bristle nose are by far the most active and are constantly moving around, showing off at their caves, scrounging, or battling for territory, has to be my favorite to watch because they are just so active in comparison. I have had them even flare at me or give me a territorial wiggle as I approach the tank.
My Sailfin is constantly behind one rock or in his large cave. I only catch him out and about if I come home off my normal routine. Clowns are pretty shy unless they are on food.