Actually, the nicest place I have ever lived is in South America. Unmatched beauty and nice, albeit humid, weather. But I exclude that from the equation and would pick SD, because in SD you are less at risk of being kidnapped to raise funds for a revolutionary army or the government turning your house into a military barracks without just compensation.

I travel a bit in my job, about 60k miles/year to Europe and Asia (I also go to DC, NY, and Chicago and other large US cities a number of times each per year). There are cities I just love, Paris, Barcelona, Florence, Tokyo, and would love to live in, IF I were single without a family. For that matter, San Francisco is my favorite US cosmopolitan city to live in if you are single, but I would not live there for the weather, or any of those other cities, save Barcelona.

SD is the best combination of weather, beauty, and place to raise a family I have ever seen.

Heck, out of all the places I go to every year, SD is still my favorite vacation destination.

As for Temecula. I used to ride through there all the time on my motorcycle when I lived in SD. Not for me, and I never felt an ocean breeze there. Dry air yes, ocean breezes no.

If you want to see the difference between a dry ocean breeze (an apparent oxymoron) and a humid ocean breeze, just go to Miami or Daytona Beach in August of any year. There you will have mold in your soaked shirt after 6 hrs. In SD your skin will be moist, but your clothes will be dry. If that is not enough, then do the same thing in New Orleans or the Mississippi coast in August.