Very small sample size here: I've played nine seasons. First four in Detroit, relatively neutral park by the numbers though I found it to play more like a pitchers' park. I was building my team around pitching and defense, I knew it wasn't a good offensive team so I moved to Wrigley hoping to help out my hitters a little. Didn't work, my pitchers got pounded and last season my team bottomed out and hit around .240 anyway. This season I figured let's try to play to my strengths and moved to Portland, an extreme pitcher's park. First 90 win season, made the playoffs. Make of that what you will.