For me its Kamino, but not like its been portrayed in SWBF, SWBF2, and TFU:II, not out in the open with small platforms jutting from the sea, but like this - inside the simulated battlespace the clone troopers train in, how cool would that be to go from being outside in pouring stormy rain and into a snowy/desert or jungle landscape of an environmentally controlled training field
Also a map set in a few levels of a Star Destroyer you have to capture/defend would be neat