All the memories of when my children were little. I have memory issues where I can't remember too much too often, but when I get a random hit of one of those memories (even if they are a sad moment) they actually trigger emotions in me (something that doesn't happen to much either)

when i re-met my best friend.
when my best friend and i were seperated after preschool so we could attend different elementary schools, i searched for him everywhere. in 8th grade, i was told by one of the adults at my school that there was a boy that wanted to play chess with me, and something about him felt familiar. I asked him his name, and yup, it was my best friend. its going to be 3 years next month that we've re-met and we are still best friends :D