It's hard to say. Space and money are factors, but also what kind of interaction, in terms of handling, you want; do you want to be able to see it in a nice display, etc. BP's rock, but they don't come out until night when it's dark. Then you can turn on a dim light to sneak a peak at their antics. But handling - a beardie or a BP. Geckos are cute and "on display" but not as docile. Watch the tails on the crested geckos.

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