I've noticed that most people have a strong preference for maintaining either aquatic or terrestrial enclosures for amphibians. Here's your chance to state your preference. Feel free to explain why you prefer one or the other.
Sam,
You have some good points. Species mixing however is generally not recommended, at least not by beginners. Even when it is possible then other factors have to be weighed in such as the need for larger tanks, risk of disease transmission, temperature and compatability requirements for the various species, and so on.
Chip