I've lived in a few places in Virginia, briefly in North Carolina, upstate New York, Princeton New Jersey, and a series of places in Massachusetts.
I've spent a lot of time in Maine, Vermont, New Hamphire, Connecticut, Maryland, Washington DC, West Virginia, Florida, Arizona, Nevada, and Colorado.
I've only briefly visited California, Alabama, Georgia, South Carolina, Pennsylvania, and Texas. Oh, and Tennessee.
And have only ever had short flight layovers in a few others - certainly no way I could make an opnion on any of those.
Probably a few I'm forgetting, which means that they aren't likely places I would want to live if I can't even recall them clearly.
Spent a decent amount of time visiting in Eastern Canada (Onterio, Quebec, Nova Scotia).
Spent hardly any time in a few Mexico border towns.
Visited the Bahamas.
Was in Norway for over two months.
Been to Lodon for a week, and around parts of France (mostly Paris) for two weeks.
I currently live in Bermuda.
Of all of the places I've been in the states, I would say that Colorado is the best. I've never been to Monterey California or Portland Oregon - but I've been told that if I liked Boulder CO, then I would love those places. Also, people from Seattle swear by it.
NY and MA have high taxes - the worst being that the rest of NY is paying taxes largely for New York city - which is as far away from parts of upstate NY as it is from cities in Virginia.
They also get some brutal weather - which is excellent if you are into skiing.
But again, Colorado will still be better there.
In Colorado you can have all 4 seasons in a day depending one the month and your elevation. If you are easily susceptible to nose bleeds, then Colorado makes that interesting with the dry air and the low pressure as you go higher.
West Virginia is beautiful, but can be a bit tough if you aren't used to the area. I'm personally of the opinion that it should be make into a National Park.
Vermont is similar in that sense, beautiful country, and it is now becoming a tax haven for many companies, including insurance - so it is bringing in a lot of money into the state. Beautiful place and still relatively cheap - now is an excellent time to get land there (well, as with anything, years ago would have been better yet).
But it is a bad call to live there and then commute to say Boston - many do it, and it is painful.
Parts of Texas that I saw were pretty cool, but then Texas also has Galveston, which is what Hell on Earth looks and feels like. I've heard Austin is nice, but haven't been there.
That said, I'm not sure where I would move if I went back to the States - maybe Vermont - I'm not particuarly big on straight up income tax, and Vermont agrees with that at least on the state level.
In terms of anywhere in the world, so far, I'm living in the best spot in the world I've ever been to.
Norway probably coming in second for me out of where I've been - but that was many years ago and it has changed a lot from what I've heard and now has gangs and drugs and the like.