I think you need to spend more time thinking about weather. What do you want your day to be like. I grew up in Seattle, I know what it's weather is like. I know it rains, but it really doesn't matter till you get older. When young the outdoors is great. Now that I am older, I know what to hot is. I hate AC, I hate 100 degree days. I don't mind the rain if I am inside. Don't care how cold it gets at night, I am in bed. Care a bunch about where it gets during the day. Anyhow, after spending a ton of time thinking about it, I think the best year round weather in the US might be near El Cajon California. Great beer seen is a plus. (San Diego) This link will give you some more west cost weather data. Sorry, haven't found it for the East or Central America.http://www.wrcc.dri.edu/climsum.html
and for you Michigan guys, here is a link to the most expensive auto insurance in the US.http://finance.yahoo.com/news/10-most-expensive-states-auto-070135228.html
as for Europe, that's over the pole from the NW. Maybe even cheap out of Vancouver.
My choice might be Boulder, at least half of the year, then Tucson for the winters.