I guess what I'm saying is,
Time can be a burden. You don't really become you until around 13 years or so. Really 16. Before that, memories are very unreliable, because your self-definition is in flux.
A couple decades after that (36), you start to feel a little old.
A decade after that, your awareness of having many, many years stored up in the ol' hippocampus starts getting a bit heavier.
...