I was totally torn between approaching this realistically or not ;) The world is too large to pick ten places, that being said the world is so large perhaps I should just stick to the U.S. where I will have the most opportunity to explore. This was my decision in the end, with a few picks for hopeful travels outside the United States, some common, some maybe not. I would also say that these are in no particular order.
Take time to marvel at the wonders in life.