Boku no Hero Academia - Episodes 128, 130, 131 - Midoriya Talks to One For All Users

While he recovered in the hospital, the unconscious Midoriya met all the previous uses of One For All.

The aftermath of All For One taking Shigaraki and destroying many cities dealt with Endeavor's family. He needed to explain publicly how Dabi, one of the most destructive Villains, was his dead son, Touya.

I started caring about the Boku no Hero Academia again when all the secrets of One For All came out. Midoriya talked to all eight previous users. They told him that One For All's characteristics changed when Nana Shimura gave it to All Might. The personalities and different powers of One through Seven only came out when the "Quirkless" Yagi and Midoriya received One For All. This is why All For One so desperately wants the Quirk back. Thus began the Dark Deku arc when Midoriya left UA school to protect his friends.