1) AT&T Field (San Francisco)- Most baseball fans that have been here probably have it in their top 3. It's near downtown SF, but not in it, easily accessible by mass transit, easy in and out, and the bars/restaurants nearby are the best of all the parks I've been to. Inside it's immaculate... sitting on the bay with great views everywhere. The food is great, seats are good enough, and fans are fun. Only gripe... it's always colder than I expect it to be there. I was wearing a sweater to the Giants/Jays game in early June.
Hope you enjoyed my MLB park rundown... I don't think there will be any new parks in the next 10 years so I won't have to update this anytime soon :)
EDIT- found some pics from the missing parks. Boston is updated in 30-21, Anaheim is updated in 20-11, and Colorado is updated here. Colorado pic is from 04 though where I had a decent view from 1st base.