Great !!!
@ Jürgen: You made me curious if anyone's ever seen an in situ shot of 2 European viper species basking together. The only true syntopic species I've witnessed, was ursinii + bosniensis in Montenegro, and I've heard about xanthina + ammodytes, but to capture it in a not-staged picture would be really sweet!
@ Peter: Your international targets are cute monsters.
@ Vlad: That toy looks like something I would break within the year
My own answers ...
1) Hyla molleri, the "new last species" on the list
2) Too many to mention, but I'd also like to witness (and MAYBE photograph) some special stuff. I've never seen male snakes fight
3) All the herps that intrigued me since I was a kid - anaconda, gila monster, leatherback, komodo dragon, flying dragon, goliath frog, Andrias davidianus, Chlamydosaurus kingii, marine iguana, any member of the Hydrophiinae, Crocodylus porosus, gharial, Chelydra sp., Trionyx, Ophiophagus, Bitis, Necturus, Corallus caninus, ...