Since this is the dead of January, and there's not much baseball to talk about, let's talk about where you've seen games.
Shea Stadium, more times than I can count
Yankee Stadium, 6 times
Camden Yards, 4 times (first ballgame I had a beer after turning 21 was here)
Fenway Park, 3 times
Veterans Stadium, 3 times (haven't been to CBP yet)
Olympic Stadium, 2 times (RIP, Montreal Expos)
Skydome, 1 time
Turner Field, 1 time
Wrigley Field, 1 time
Candlestick Park, 1 time
Oakland Coliseum, 1 time
Dodger Stadium, 1 time
As for the minor leagues, I've seen the Norfolk Tides, Binghamton Mets, Hudson Valley Renegades, New Jersey Cardinals, and Brooklyn Cyclones all play at their home ballparks.
My favorite ballpark is Wrigley, and my least favorite is the Vet (good riddance). Most overrated is Fenway (tiny cramped seats and drunken Massholes all around you), and most underrated is Dodger Stadium (perfect weather, and instead of the Van Wyck and the auto salvage yards in the background, you get a view of the hills of Elysian Park and the San Gabriel Mountains).