I agree that nothing makes any of your categories better than the others: achievement, fun experiences, relationships. But if I look back on my life so far, something that
does seem worth optimizing for is intensity/high quality.
I've had experiences that I enjoyed every minute of (for example because they were new, or doing things that I love). Periods of hard work that stand out in my memory because of how much I learnt, accomplished, felt the 'flow' state. And time spent with people I'm close to that deepened those relationships and gave me a huge sense of connection.
For me, being conscious of what I invest my time in is less about the category of experience, and more about generating opportunities for high quality experiences, making sure I don't pass them up, and being present in the moment during them. I'm not great at this, but it's what I try for.
I've had experiences that I enjoyed every minute of (for example because they were new, or doing things that I love). Periods of hard work that stand out in my memory because of how much I learnt, accomplished, felt the 'flow' state. And time spent with people I'm close to that deepened those relationships and gave me a huge sense of connection.
For me, being conscious of what I invest my time in is less about the category of experience, and more about generating opportunities for high quality experiences, making sure I don't pass them up, and being present in the moment during them. I'm not great at this, but it's what I try for.