I have traveled quite a bit, and I'm always happy to come back to Maine. There are no big cities, but who needs 'em? We are at the northern end of the Appalachians and have wonderful hiking for all levels of fitness and skills. We have brooks, streams and rivers with the last truly wild brook trout populations in the northeast. If you like whitewater, we have rivers like the Dead, the Kennebec, and the Penobscot (and many smaller rivers) that will challenge you. We have a beautiful coast (though many of the tiny scenic coastal towns of my youth are being overrun with rich transplants who drive up the property values and the taxes, forcing natives to retreat inland). The northern half of the state is quite wild, and access to most of it is almost exclusively by logging roads, by foot, or by river travel (the St. John waterway and the Allagash are fantastic if you can invest a week or so to paddle them). Our clubs and bars are small and there is a wealth of world-class live entertainment to be had without blowing your budget. Since Maine is geographically at the NE corner of the US, lots of national tours of big groups start here in the colleges and municipal auditoriums. I attended the first concerts of the inaugural tours of the Mahavishu Orchestra, the New Riders of the Purple Sage, and the Blue Oyster Cult. In addition, established groups like Jethro Tull, Alice Cooper, the Dead, and many others have kicked off tours here with new material.
Perhaps the best feature is the character of the people. About 25 years ago, my wife and I went to New Hampshire to attend a wedding, and we stopped at a really pricey leather shop there on the way home. My wife picked out a nice pair of deerskin gloves and a purse and took them to the counter. I hauled out my checkbook and wrote some pretty big numbers (at the time) on that little piece of paper and handed it to the owner. I started to reach for my wallet for an ID, and she said "don't bother - you're from Maine". I was flabbergasted. Shop-owners in coastal Maine didn't have that level of trust in other Mainers, yet this lady in coastal NH had no qualms about taking our check with no ID. As a parallel, when I was in college, I had a young lady I was interested in back home, and I had a summer job waiting there in the veneer mill. My uncle from West Hartford told me to come spend the summer with them and I could work either at Colt or Pratt & Whitney. I asked how I could get a job at either of them on such short notice and he said "You're from Maine - they'll hire you on the spot." He said that if you are from Maine and especially of French-Canadian lineage, they assume that you are honest and a hard worker. I could have made 3x the money in CT that I made in ME that summer, but that lady was awfully sweet.
Conversely, I have friends who moved here from Brockton MA, because of their experiences with Mainiacs. They came up here summers with their Harley and we rode together. One day when my wife and I had to work, they took a jaunt through some pretty rural areas and ran into a thunderstorm. Bob parked his bike under a tree by the road and they were going to ride out the storm there, when an older couple sitting on their porch across the road hollered "You come up here and get out from under that tree!". They joined the couple on their porch and watched the storm move through, sipping iced tea and eating cookies. When I met up with them after work, Bob was still in shock. He said that back in Mass, if people in black leathers riding a Harley stopped across the road, the couple would have sat there doing nothing or gone inside without a word. Of course, we bikers run the biggest charity event in Maine every year, drawing tens of thousands of riders to donate toys, money, clothing, etc to the Salvation Army in concert with the Marines "Toys for Tots" program. We bikers are the tail shaking the dog in this state's TfT program, and people line the roads along our travel routes for hundreds of miles waving and holding up big signs thanking us.
Have I gushed about Maine enough yet? In order to prevent a mass exodus into the state, I should mention that our taxation rate is horrible - even worse than the black flies that seem to last all summer long and eat you alive. Also, there's all those damned tourists all summer long, making the southern/coastal zones uninhabitable from Memorial Day to Labor Day.