Floated around as a kid, and latched on to 'fun teams that are good' in the late 80s/early 90s... so I got some championships as a Lakers and Dodgers fan... not so much with the Bills haha.
Best championship for me, was Lakers vs Celtics in 2010. Best individual sports memory was Kirk Gibson's homerun in the 1988 World Series.
If the Bills were to ever win a Superbowl it'd take the crown, I care about them much more than the other two teams, probably because they've struggled so much (and also I enjoy watching football more than basketball and baseball... but enjoy playing basketball the most)