I've been there a few times. Four times, to be exact. I've seen the Golden Gate Bridge, I've been to Ghiradelli Square. I've seen a Giants game, been to Fisherman's Wharf, ate sourdough bread, taken a picture with the Painted Ladies (the homes, not the ladies), ridden the streetcars.
I'm not sure, given its level of crazy/scary bums and streets infested with human excrement, San Francisco has what it takes to draw me back again. I may be done. Weird to think that, but I think it might be true.