The Kakashi I know must've took my death pretty hard if half the things I've heard are true.

In the years I've known him he's been a rigid rule following extremist who believes the mission is everything and teammates are expendable if it means it gets done. Being late was subjected to scorn, and he was too brilliant for his own good. I think I finally cracked him when I died, he actually came back for Rin when I went to save her so... yeah.