We lived in Benicia in the early 90s on the company dime. Even then it would have otherwise been beyond our financial reach. But it was, hands down, the best place we ever lived. I would rate many of the other towns in the San Francisco Bay area with similar regard -- if you have money. I remember doing wonderful century bike rides on Sunday mornings, pedaling my mountain bike up Mount Tamalpais and Mount Diablo, golf, yacht racing, day trips to the wine country and Marin County, trips to Yosemite, Lake Tahoe, Monterrey, the AT&T Golf Tournament, San Francisco for entertainment, and so on. All of the great National Parks of the West were within a reasonable drive for vacations. And we could do all of this while living in a walkable town. It had a small diner with fabulous food (call Mables). If I were retired with money, I'd go to an area like this for the shear variety of fabulous things to do. Don't know if living there is still as good. It seems the best places eventually become overcrowded and congested with traffic and pollution. There was a time when LA was the best place to go. That's why the entertainment industry wound up there.
This question of "best town" is top of the list for me right now. We intend to relocate (from Houston) now that my working days are over, but money is not unlimited. I'd consider PA if it were not for the cold, snowy winters and corruption. Right now our list includes the Smokey Mountains and surrounding area, the Ozark Mountains, or the Pacific Northwest. If my wife was OK with snow I'd be including Colorado, Wyoming, and Montana.
For those with the Desert Southwest on their radar, consider that populations have and are continuing to grow there with retirees and our friends from across the boarder, especially in Arizona. California is already overpopulated. Central Texas is now overpopulated. The entire region will soon have serious water resource problems. If the West gets hit with an unusual drought, massive populations will need to migrate in a short period of time. It will create the kind of anarchy that is not unprecedented in human history.