When I had to leave Santa Monica for a few months in 2014 I had a number of people I knew from walking around town excited to see me back and noting my absence. It's a strange thing to have that level of familiarity with your extended neighbors, especially in the midst of such an anonymous city.
It is also radically expensive to live here. It helps to be in engineering. Most of my close friends employed in entertainment, fashion, and office work have been pushed out of Santa Monica and the Westside and into the Valley over the past 5 years.
People say this about a lot of places in California, but it's not my experience. "Perfect weather" seems to mean a dystopia of identical days, no changes, no wind, no clouds, just constant sun. Living in Alameda/Oakland drove me crazy in the summer. Nothing ever changes, every day is exactly the same. Yuck.
Santa Monica weather isn't nice for everyone. But I get it, there's a lot of sun and not much rain.
https://en.wikipedia.org/wiki/Santa_Monica,_California#Clima...
I guess my point is the spectrum of weather is very narrow but there's still some diversity.
For someone who probably has mild seasonal affective disorder, sunny days really make a considerable boost in my mood.
I like rapidly changing weather.
The weather in Los Angeles is quite nice. I worked at 2nd & Colorado (the floors above the McDonalds are office space). My wife and I would meet there, walk to the pier to get a churro, and then have a nice dinner at the promenade a few times per week. Super nice for a vacation, but still I did miss actual weather or the beauty of a thunderstorm. Different strokes for different folks I suppose!
Also, it was fairly hostile to cycling (albeit better than anywhere else I've ridden in southern California). Gotta say, though, the pool at Santa Monica College was spectacular, and the quality of instruction in their night classes is how I got my career started (and learned a bit of German!)
But don't get me wrong, it does get old. Whenever rain is in the forecast, it gets me and many others pretty damn excited. That's why often times I'll go up to Seattle for a week just to work in the rain.
The 70-80F always sunny weather and relative affluence definitely helps too.