We are the Association for Child and Adolescent Mental Health, or ACAMH, for short. And this is ACAMH learn. Think about your own life for a moment. For you personally, what was your most important life event in recent years? This is the question we posed to more than 1,400 young people, surveyed multiple times between the ages of 15 and 24, as part of the civic project on social development from childhood to adulthood. Their answers produce over 5,000 brief, open-ended and wide-ranging text responses. Reading a handful of these stories is easy. Making sense of thousands of these is not. So how did we tackle this? We applied modern natural language processing to group the text data into recurring themes, letting us explore young people's inner lives at scale. Conceptually, our approach sits between qualitative and quantitative research. The questions and data are open ended and exploratory. The analytic pipeline is quantitative, with humans in the loop for manual correction. In doing so, we developed a reusable methodological blueprint for transforming large volumes of text data into structured insights. We shared the code openly so it can be adapted for other data sets and research questions. But what did we find? Most life events were positive and rather ordinary. School and education, friendships and romantic relationships, leisure activities and successes. First, steps toward independence. H shaped what mattered most. In mid-adolescence, school and friendship's dominated by young adulthood. Work, partnership, and independent living came to the fore. Mental health mattered too. Symptoms of anxiety and depression were linked to reports of interpersonal events, stressful events and loss, and to fewer positive achievement related events such as education, work, travel or sport. Intuitive and still meaningful. Our findings challenge how life events are typically studied. Most research checklists focus on major stressors and rarely capture the positive, seemingly ordinary milestones the events that actually matter from the perspective of young people themselves. Our work suggests that we should not only help young people cope with adversity, but also actively support the positive, personally meaningful experiences that define this important period of life.