For now, I've only been to Shea, Yankee, Fenway, and Dolphins Stadium. My friend and I hope to hit about 14 before I graduate from college, with the 14 being:
Shea, Yankee, Fenway, Rogers Centre, Comerica, Progressive, US Cellular, Wrigley, Miller, Great American, PNC, Citizens Bank, Camden, Nationals
PS: I went to one game at Fenway for my graduation, saw a Red Sox win over my hated braves, saw Andruw Jones K swinging all 5 times he batted(including to end the game)...he was the first guy i think to ever do that, and caught a ground rule double from Kevin Youkilis. Pretty successful, I'd say.