>flush with urine smells, mentally ill homeless, an embarrassing public transportation system

  urine: no worse than London, where I moved form.
  mentally-ill: more than London, and it doesnt bother me
  transportation: bad enough that (as in London) I ride a bike everywhere
  weather: better
  start-up friendliness: much better (than when i left in '06)
  

Not liking SF is fine. Besmuding the judgement of its residents to fit your own tastes: not so fine :p