im going the answer this incorrectly:
come during a street event to experience sf at its finest. soonest upcoming is pride i think.
go to the academy of sciences
eat a burger at super duper
go to: the haight or dolores park (weekends r best) - purchase drugs, take them.
wander around downtown and through the TENDERLOIN. youll get some good sights
see both bridges, golden gate and bay bridge. bay bridge is having a nighttime lightshow.
Alcatraz is pretty sick when its nice out and you get to take a ferry on the bay
go up to the top of twin peaks
roam the streets of the mission at night, drunk obvi and go to bars