Google memories shows me lots and lots pictures of my dog that died 1 year ago this week. Of course I was sad when reminded that my good boy wasn't around anymore, but the more I saw the pictures, the more I remembered the good times. The constant pictures reminded me that he had a good active life. It's now a conscious decision to not turn off this feature.
I used to park my car in a fairly big subterranean parking with like 6 levels and thousands of spaces, it was often more or less full so my car could be really anywhere. To not have to walk around it all to find my car I took a picture of where I parked for finding it easily (numbers & floors were on the ground.
Got myself a wholesome collage of my car in different parking spaces, sprinkled with flowers from google photo.
I took a bunch of pictures of me and my cat just before we took her to be put down (cancer sucks). I obviously looked pretty upset in all of them. Like, three months later my phone put together a slideshow of misery to celebrate the occasion.
Mine has been broken for some time now and keeps sending the same slideshow with the same top picture everyday, but I don't want the feature in the first place so just ignore it.