As I have mentioned before, I follow sports much less than I did 30-40 years ago, but because both general guy culture and specific sons follow them I do keep my hand in. I had given up following football at all until Belichick and Brady came in and I do pay attention now. My prediction was that after both are gone that will fade in New England, but we do have a generation which grew up with them at this point, so we'll see. Similarly, I stopped following the Red Sox around 1990 as interesting only in that they found a new way to torment us every year, but relented late in 2004 and actually did watch the last game of that World Series, when the world inverted. I followed for a few years after that, but have now reverted to my pattern of not even knowing who is on the team until about August, then checking in whether this is worth following.
I go back-and-forth with the Celtics. I check in once a month. This year I pretty much signed off at Christmas and by February was insisting to Son #2, the sports expert who has many stats at his fingertips that it wasn't worth it. He countered with very good stats that they were in fact doing well, losing only by a few points but winning by large margins, which is always the mark in any sport of a team that is just about to bloom. As I had taught him that rule when he was in middle school I felt obligated to trust him on this. So now Boston is crazy good since then and the playoffs are fun.