I voted professional, but I'd break it down into separate categories, because my favorite venue is minor league ball, especially "A" ball. I love the ambiance of the small town supporting its team, the players who finally get to do nothing but play baseball--and get paid to do it--and are scrambling and scrapping and scratching to hold on and make it to the next level. I remember when my brother was playing for the Madison Muskies, then an Oakland "A" ball affiliate, and it snowed over Easter. The fans were bundled up in the stands, drinking beer and chanting "Go Fish, Go Fish!" and absolutely adoring their players. It was great. I love how folks get up and pass the hat so the kid who hits the homer gets a few more dollars in his pocket that night. Minor league ball has a purity about the game that you just don't see anwhere else, in my opinion.