I'm probably in the minority, but I think the only players with a retired number should have been Russell, Bird and Reggie Lewis (cause he literally gave his life for the Celtics). No Pierce, no KG, no Tommy, not even Havlicek. Instead of retiring their number, I'd put their name in the rafters, like we've done with Loscy. But that's just me.
KG was obviously amazing. No one's arguing against that.