Starting at 16 years old I wrote a letter every birthday to my 30 year old self with ideas of who I want to become and how I ought to judge my success. I hoped when I turn 30 to open all of them up and realize how much I accomplished would be satisfying. Through the project, I actually discovered two things. First, I estimated a rate of progress that exceeds the real possible magnitude of accomplishment by about two…
I also vastly underestimated the amount of time and energy it would take to excel in certain things (for example, I wanted to compose and play music, excel at math and physics, write fiction books, play tennis, all at professional levels) and overestimated the difficulty of a few others (namely escaping poverty/becoming wealthy). Though, I suppose this may be the consequence of work being such a major timesink in one's life and my having the fortune of various opportunities in my life.
Similarly, my desired storylines and opinions have all been roughly the same since then. There have been occasions where they shifted, but then returned as if to equilibrium after a brief amount of time. As someone who views themself as having a terrible memory, I suspect it may have less to do with memory and more to do with some stable characteristic with emergent qualities. To extend the equilibrium analogy - a spring doesn't need to "remember" its equilibrium position to reach it - after experiencing friction for enough time, it'll reach it again.
It's nice being able to see a reflection of my past self though. I think I'll try to keep a diary again.