As you approach different ages do you think about how you want to act/be in that age?

I ask because I’ve done this throughout my life. I thought about how I wanted to act and be as a teenager, young adult and now middle age (as I just turned 40). I’m wondering how common this is.

I’ve been thinking a lot about people who have mid-life crisis-es. Why can’t they understand why they are doing what they are doing?

Did you think about it and aim for a goal? Or do you just wander through life?