I would actually have to go with the American Green Tree Frog. I bought one from my work (I work at a locally owned pet store) and he's been a delight to have! He is the most vocal out of all my tree frogs. If I play a calling Green Tree from YouTube he will croak back. I'm also a big Law & Order fan and I've found out he will croak to the entrance song if it is played. My White's Tree Frog is pretty much stationary. He sleeps in his corner all day and will perhaps wake up at night to soak. He's very lazy, but that changes when it's feeding time!