What important decisions do people make at different stages of their lives?

Well, I'd say younger people tend to make more personal life decisions while older generations focus on family matters. For example, when I was in university, most of my friends were choosing majors or considering study abroad - very self-focused choices. But now that I'm working in Shanghai, my older colleagues are always discussing things like buying apartments or their children's education. That said, there's some overlap - like my half marathon decision showed, even personal goals can impact family life later. What really changes is how much we consider others in our choices as we grow older.