Fenway and Wrigley are great for the nostalgia piece, but they aren't the best places to watch a game
Dodger stadium isn't anything special, in my opinion. It's a typical big bowl that all stadiums built at that time used. If you're a dodger fan it's great, but outside of that . . .
I haven't been to Camden yards yet, but I want to. It was the first of the new "retro" stadiums when it opened.
Petco is a great place to catch a game. Love the location and the atmosphere
Haven't been to Busch
Coors Field is a really good place to catch a game. I've really enjoyed the games I've been to there. Nice stadium, good location, and good design