I think natural nice to look at set ups are for the keeper not the kept.
However, like most said you meet the animals needs and the animals need will determine what the cage looks like.
In my snake room all the cages are newspaper/plastic hide box set ups. In the livingroom though I keep one natural cage for my Amazon because I think arboreal snakes look best in a "natural" set up. Also when non-herpers come to visit my snakes they are expecting my room to look like the same displays they've seen at a zoo so also for that reason I keep the natural set up in the livingroom.