I've had tanks and tubs. I like the tanks because I see the snakes more, and I see them at night quite a bit being a long term evening/night shift worker. But I notice that the snakes seem to do better in the tubs. At least for me they shed much better and eat better.

When I buy a house, I'll probably have a few display cages simply because I like to look at snakes. I'll be keeping the majority of my animals in tubs for the convenience.