Ooooh, i'm kind of a travel junkie: Taiwan, Thailand, Cambodia, Turkey, Bulgaria, Serbia, Canada, Portugal, Spain, UK, France, Mexico, Japan, Finland, Russia, Estonia, Guam, Australia, French Polynesia, Namibia, Antarctica, Argentina, Uruguay, Germany, Austria, and Italy. Some only for a day or two, but I can at least say I've spent the night in each of them, as well as on every continent. I've also been to most of the coastal US and a few of the states in between.
I'm starting to plan a trip to Iceland in September. Has anybody been? I'm worried that some of the mountain roads will likely be shutting down for winter, but I'd imagine there will still be plenty to do to fill a couple weeks.
Nu-D: Argentina and Japan are fantastic. Buenos Aires had some of the best food I've had abroad. I was having steak dinners and red wine every night for $10-$15 USD- so much so that I gave myself gout before a two week cruise!
EDIT: Actually, come to think of it, pretty much everywhere had better food than the US. There were no countries where I universally hated the cuisine, though a few places (Bulgaria, Russia, and Namibia) were mediocre in a lot of places but with a couple of real standouts. The biggest surprise was Australia- I'd often have eggs, bacon, toast, and tomatoes for breakfast, but something about them just tasted so much richer than the US. I think a lot of it comes down to produce- folks here can't pick out quality fruits and veggies, and as a result they are grown for appearance over taste (I'm looking at you, Red Delicious apples!)