I'm gonna have to go with Europe.
I'm an American, so of course I love the muscle. And Japan makes some really, really cool cars, too...
But European cars are just so much cooler. Also, as was mentioned earlier, they've got everything. Literally everything: huge cars, midsize, small, micro cars, sedans, coupes, wagons, FWD, RWD, AWD, front, mid, rear engine.