I grew up a huge Yankees fan, mostly because of Micky Mantle. This was back in the day when TV showed THE game of the week, with Pee Wee and Diz. Larson, Berra, Ford, Stengel, Howard, etc.were like super heroes for me. But, when the AL went to the designated hitter, I pretty much "quit" the AL. I switched to the Reds, with Bench, Morgan, Perez, Rose, etc.
After the "strike" I mostly gave up on MLB and now only get interested in the play-offs. Still am not a fan of the DH, so I'm usually hope the NL will win.