Great topic. I have worked in the industry for years, and agree with a lot of points. For me its elephants. Dangerous to work with, knew someone injured by one. Needs to be hands on and a lot of criticism from anti zoo people when they see keepers trying to use hands on control. They travel big distance in the wild and take a hell of a lot of space. Safari parks mildly better, but not great. Big problem is listed buildings with exhibits. E.g. london zoo and bristol zoo. When I worked with bristol zoo had constant complaints from public about the space for the pygmy hippo s. I worked with them and agreed but it was all listed buildings and restrained by overall site space and paperwork. They have the new park on the outskirts now, that would be an idea. The seals on my section had a great zoolex designed enclosure. I worked with inverts a lot, they are great as they require less space, many species live aboreal so less ground room. Also you can create beautiful natural exhibits for them, bit harder with say a rhino, trying to recreate the Savannah in kent! Love this site guys..