I think it is great place to retire to unless nice restaurants and and fancy shopping are something you need to have easy access to. I like the rustic “Janet’s Cafe” and a few other spots for coffee, ice cream and such.
The pace is going to be very slow unless you try hard to get involved in the community somehow. As you probably know, Rancho Palos Verde is somewhat isolated from the central community by being several miles from the small town center too.
Health Care facilities are very accessible in La Mesa and El Cajon.
If you need to go into San Diego or other parts of the county often, to visit family or carry out errands like many seniors end up doing, that driving might be a drawback.
I have never lived there so there may be negative elements I have missed. Maybe some tough guy jerks that stand out or something like that.