I'm an Indians fan, myself, but I root for the Reds too, and my mom was a Reds fan, so I saw them play a lot when I was a kid back in the 70's and 80's. Riverfront Stadium had a atmosphere comparable to Yankee Stadium, only instead of a bunch of Drunk New Yorkers, it was a bunch of Drunk Hillbillies and Rednecks, throwing their beer on people and yelling throughout the game, especially up in the Reds Reserve Seats. Cleveland fans tend to be a little more subdued. Haven't been down to the Great American Ballpark, but I did go down there the last year they played in Riverfront.