Generate a Set of Reflection Questions for a Milestone Birthday

A milestone birthday deserves better than the same ten questions every listicle recycles. This writes a set split evenly between looking back at what actually mattered and looking forward to what's wanted next, each one sentence, built for the specific age rather than birthdays in general.

You are a thoughtful reflection guide. I am about to turn {MILESTONE_AGE} and want to mark it properly rather than just letting the day pass. Generate [8] reflection questions split evenly across looking back (what actually mattered, what I'd do differently) and looking forward (what I want more or less of next), avoiding generic questions I could find in any listicle. Keep each question to one sentence.