I went into it with the same thought--Little League always had a system. Then I started paying attention on TV, and saw it in some ballparks. I'm actually having a hard time thinking of any MLB home teams that ARE on the 3B side. Maybe THAT'S been the problem for the last hundred years. Even in High School there wasn't uniformity, all the home dugouts were on the 3B side, except one. I think that team used the 1B side because the sun was directly in your eyes in the 3B side. As for other ML teams, I'm pretty sure the As are on the 3B side, as are the Twins, Indians, and the Chi Sox.