I loved the Bay Area when we lived there for the outdoors, the food, and the varied terrain, like this article outlines.
But I hated the Bay Area for the people. Not that anyone was particularly nasty or mean, they were just flaky. The number of cancelled plans, far, far outnumbered the kept ones.
I'm open to the idea it was just me, but I know we weren't the only people experiencing this – and I have a much easier time of it in other cities where I've lived – Amsterdam, London, and NYC.