I can't think of anything now.
I used to be upset that I'd left a suitcase with a friend who said they would take care of it, and when I got it back a year later the yearbooks and newspaper mementos were gone. My friend said the suitcase had been empty, but it had not been! Now though, I don't care at all, I would have gotten rid of those things myself, if not when I was younger, then for sure when I retired and sold the Nebraska house.
And when I was young (Junior High age) I had been upset that my parents had thrown away my childhood toys, though I was only sad about the toy horses, but that "hole" was filled in after I adopted my daughter and gave her all sorts of toy animals that we played with.