I'm also leaning toward Los Angeles, but I don't have an acceptable, practical reason. I lived in San Diego for two years. I couldn't afford living there even while working a part time job while also working a full time job, but I felt like I belonged there. I haven't lived in Los Angeles, but until recently I visited a couple of times a year and had the same feelings. I'd like those feelings to be permanent for the last few years of my life.
When looking for a place to retire spend the time to explore locations. You presumabley have the time and money to travel so use it.
We flew to Denver,rented a car and spent enough time to become familiar with Colorado,Arizona and New Mexico. We ultimately moved to New Mexico and never regretted it.
When we decided to go urban we spent 2 weeks each in Charllotte,NC,Atlanta,GA and SanDiego,CA. We moved to SanDiego and never regretted it.