I won't number mine, because deciding is hard.
France - I know some French, and from what little I know about it, it seems like one of the solidest countries in Europe. It's demographics are solid, standard of living is very high, education is good, and it's a large country with an interesting history.
Sweden - I've been to Sweden twice, and liked it. Their education system is top-notch, standard of life is superb, and they manage to do it without relying so much on natural resources (unlike Norway). Believe it or not, the women aren't as nice as society claims they are. At least, I didn't think so.
Denmark - I've been to Denmark once, and I got pretty much the same impressions as I did from Sweden. I'd probably prefer Sweden, though, because of it's more Northern climate. Still, Denmark has the #1 standard of living according to some random index in the world.
Russia - I know the language, I have relatives, and based on current trends (discounting the crisis) the standard of living will quickly (~15 years?) approach that of European countries. What's more, it's a huge country, which makes me want to explore it. Somehow. Which I'll never do.
Well, these are the top four. I can probably be happy in most Western European countries, and I can live in Norway or Finland, but there's nothing that I know that special about the rest. Canada... eh. It's like the US, but colder. Also, as you can see, I'm avoiding Asia (and Australia, South America, etc)like the plague, for the most part. Japan and Korea are creepy (TENTACLES!(at your own risk)), and everyone else is poor. Aww.
None.