The view from the openings in the outfield at AT&T. Not a bad place to watch a game - being at field level is pretty interesting, especially when the long fly ball is hit out there and the outfielder catches it right in front of you. And if it gets too crowded, you can just walk along the marina, enjoy the Bay view, and listen to the game over the loudspeakers.
It's a great place, but I still prefer the Coliseum. Sounds funny, but it's true.