Maybe NYC? They both have their benefits of course.
LA has perfect weather, beaches, gorgeous parks and things to do outside of town. SF, San Diego, etc are nearby. However, it's a city full of entitled jackasses in a lot of ways. It's very expensive to live in nicer areas and owning a house in a reasonable area (at least where I'd want to live here) costs at least a million for even a tiny place (house - not condo).
NYC has great a transportation system and a better atmosphere from what I can tell the times I've been there. However it gets cold and hot as fuck there. It's also crazy expensive, more than LA.
Edit: after thinking more, I may like LA more. But SF and other areas might be even better.