San Francisco 2004, the short version
Staying six blocks from Chinatown was great - I ate dim sum several times. They sell it by the item at small shops. The sushi is awesome too, and you can find good food of almost any nationality. The famous cable cars are incredibly inefficient, but loads of fun. Haight-Ashbury used to be a hippie mecca, now it's an "alternative" neighbourhood with weird merchandise.
"The coldest winter I ever spent was a summer in San Francisco" -- Mark Twain. Yes, it's a little cooler than Georgia, 70° steady during the day. I loved it. The Victorian houses are pretty. The hills are hell to climb, but offer some really awesome views. Dress warmly and enjoy it: it's a great city.