This could also be an investment in future happiness. Part of the point of journaling and documenting is to later revisit and unlocking memories one might have not accessed in some time. This is part of the reason Spotify Wrapped and similar "recaps" are enjoyable. People enjoy seeing what they were like. In many ways we are the product of things we do (whether that be consuming or creating) and exploring those things at a future date is to be in conversation with ourselves.
Things like this are also a way of expressing and sharing gratitude, which is a cathartic exercise to engage in periodically. Putting into words "these are things I enjoyed" is worthwhile, in my experience, and sharing it is a small extra step. Additionally, sharing it can be a gift to the future. I can't tell you how much I appreciate effort my parents took to document parts of my childhood (vacations, accomplishments, daily life, etc.) and I know other children feel the same. It's the kind of window to the past that is only open through efforts like this.
Things like this are also a way of expressing and sharing gratitude, which is a cathartic exercise to engage in periodically. Putting into words "these are things I enjoyed" is worthwhile, in my experience, and sharing it is a small extra step. Additionally, sharing it can be a gift to the future. I can't tell you how much I appreciate effort my parents took to document parts of my childhood (vacations, accomplishments, daily life, etc.) and I know other children feel the same. It's the kind of window to the past that is only open through efforts like this.