Italy, without a doubt. I went there this past July and visited my cousin and his wife and son. I experienced what I'd call "the real Italy".
One of the big reasons I'd love to move there is for the culture. They just have a completely different way of living than Americans, and in some respects, it's so much better. One of the things that I loved the most was the sense of community in the small towns. After dinner every night, all of the families (parents, grandparents, children, etc.) would go meet in the local park and hang out until late in the evening. No TV, no video games, no sitting on the couch; just spending time with family and friends.
Another reason is the landscape and history. One of the most memorable moments of my life was sitting outside on a balcony drinking good wine with family and watching the sun set over a valley in Tuscany.
It's cliché when talking about Italy, but the food is another reason. The Italians love to cook from scratch and use fresh, local ingredients that result in some of the best food that I've ever had. Also, the meals are more than just a necessity. Every meal is an experience, meant for family and friends to enjoy together and used as an occasion to laugh, talk, and enjoy a lot of great wine.
I could go on and on about why I love Italy, but I'll leave it at those three reasons for now.