I definitely agree that there isn't 'much going on' when you look into their eyes. I know they aren't as smart as some of the larger snakes or lizards, but I think they still 'like' some things over other things.

The tubs are definitely easier to deal with, I do not have racks but I imagine they are easier than tubs even. I would take a rack or tubs over aquariums, but the enclosures I plan to have open in the front.

Good feedback thus far, keep it coming. =)