As someone who grew up in the area (and hopefully will be returning very soon) this strikes me as bizarre. I can think of a lot of reasons why it's not a great city.
- They talk more and more about rationing water due to the drought.
- There are vast swaths of the city that are very dangerous and that you should really never go to.
- The public transit is for all intents and purposes non-existent.
- There isn't really a downtown.
- The traffic is horrendous.
- Most people find the sprawl to be pretty ugly.
- The smog is a health concern although it has been reigned in significantly in recent decades.
There are some things to brag about, but there are other US cities that still manage to do it better. We've got USC, UCLA, Caltech, and JPL, but you can't quite say its scientific/intellectual presence better overall than the SF bay area or Cambridge, MA. There's some art and culture but New York does it better. Today the studios film most of their stuff elsewhere where it's cheaper or on location. And so on.
Even calling LA is a city is strange because it's hard to delimit where it begins and ends, and which of its constituent units are their own cities.
I do think there are advantages to the sprawl though, such as containing urban violence pretty effectively, and reducing the overstimulation Archie mentioned that more "walkable" cities can cause. I find a warming nostalgia in gazing down on its ugliness every time the plane I'm in starts it descent toward LAX (disgusting airport by the way).
Edit: I guess I did forget to mention the weather. Probably the best the US has to offer, although it gets hot during the summer. No real winter to speak of (I think it was mid-70s this past Christmas).