There are a lot of physical things I miss from being young, eyesight, faster recovery from injury and illness, etc. I didn't have money, I had unmanaged depression, I lacked a lot of self esteem. However, I had more friends(or at least acquaintances), more hope in people, much better physical fitness, and in hindsight a lot of my worries weren't that serious.

Aging and youth are both mixed bags. But I'll take being older without a doubt. -A younger millennial