I should have also mentioned Crissy Field. Since the City took over the Presidio, they have also done a great job in making that area a great open space recreational area. If you have not seen it in the last year or two, you should. They have removed the air strip and replaced it with a tidal area/wetlands, but with multi use pathways (bikes/jog/walk).
Business takes me into the city fairly often, otherwise, I would only go there for occasional games (Niner's mostly.
Benicia is a beautiful town. One of my co-workers got married in one of those spectacular old mansions.
The entire waterfront from Crissy to PacBell stadium is a tribute to urban planning & renewal. SF is a like a thoroughbred hitched to a haycart; when given the chance, it reverts to form ie beautiful. One can only imagine how the city would be under a more moderate form of government - probably like the 50s when my dad first arrived.