Southwest Ohio is lucky to have some very very nice college baseball facilities.
UC, Miami, Dayton and Wright State have all gotten new or very remodeled facilities in the past few years. Miami is my favorite of the bunch as it is a beautiful ballpark that has been well integrated with the feel of that part of their campus. Dayton's is equally nice, but it's location leaves something to be desired. It's right next to I-75 and can be quite noisy. Xavier's place is not new at all, but does have a very nice campus location.
That being said, I'm also an SEC guy and love almost every SEC facility. LSU and Mississippi State are fantastic. Combine all the great things about tailgating and pregame "festivities" of an SEC football game with a bit of baseball atmosphere and that's what you've got at those two places.
I also hear that Arkansas' new facility is AA-worthy. The pictures of the place on their website are impressive.
But here's my favorite:
I wish it looked that good when I was in school.