What is one major difference you notice as an adult as opposed to a child?

I notice in my 30s that all the things I want require long term investment. The three things I work on are, physical fitness, career, and a morally acceptable life. I figure if I achieve that, all the other things will come, like marriage, friends, parties, vacations, love, hobbies, social events, tasty food etc…

What is one major difference you notice as an adult as opposed to a child?
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