I can tell you the Dutch company I work for, the guy who moved his family to America for 4 years had his wife and kids crying about having to go 'home'.I've been living abroad for years now and the one question almost everyone asks me is why would I come here from America. They can't conceptualise why I would leave the US for any other country.
Put it this way, which country would you rather have a brain tumor in?
I want to travel to Europe more, and soon, and I wouldn't mind spending a year over there, but you don't truly realize, warts and all, how many freedoms you have here in the states until see how other people live.
Socialized medicine....OMG, it's so great, we all get treatment and get treated the same.......we just have slower care, and huge flat tax rates on all your earnings and usually don't have access to the best doctors.
I dunno....grass is always greener to me, but you should at least go see something else to better understand whats most important to you.

All those things you say about Europe, and yet quality of life, happiness and things you really can't place a value you on are higher there than here. You're a white male, this country is a lot different for you than it is for me.