I've been to several major and minor league parks and PNC Park continues to be my favorite. Maybe because it really is the best, maybe because I'm a Pittsburgher and a Pirates fan. But I don't think the reason really matters.
The Buccaroo stand is the best find ever! Smaller (kid-sized) versions of many ballpark staples (nachos, popcorn, pretzels, hot dogs) are available at a portion of the cost. For the cost of just 1 order of nachos, I can get one of everything on the menu at the Buccaroo stand which means I don't mind splurging on a helmet sundae.
But the best part is the fact that there is not a bad seat in the house and most seats have a gorgeous view of downtown Pittsburgh. It's nice to have something pretty to look at when your home team is losing. I recommend catching a game to everyone I know. If you're smart about it, a trip to PNC Park to catch the Pirates can cost less than dinner and a movie.