I've been far happier as an engineer in NYC and Berlin than SF. Gentrification has made SF a pretty boring place to be, and I felt that my overall sense of creativity plummeted there when I was surrounded by so few people from different backgrounds.
But, as for the other 80% that's rent controlled, lots of it is pretty dilapidated, almost borderline 3rd world country in some parts. 1% (7k people) of the SF population is homeless and even more are nearly there (despite over 240 million$ a year spent fighting homelessness).
Perhaps the reason people find SF boring is due to the hollowing out of the middle class.