San Francisco is not a friendly place despite what you may hear. Most people tend to keep to themselves and couldn't give a sh*t about you. It has a very work-life "downtown" atmosphere and a lot of people are very uptight and the "snotty" financial type. It is too expensive and the weather is horrible. Fog every day and a cold ass wind chill. It is no where near the "paradise" people imagine it to be. You can't even swim because the Ocean is too cold.
Lastly, it is filled with bums, gay people, and asians which is not the best combo.
The suburbs are really nice though. And yes, this post is meant to bash San Francisco.