I feel like I've spent my entire life preparing to do something worthwhile, but I don't feel like I've actually done anything yet. Thus, I suppose I would regret not having more fun with my life up to now, and not having had the chance to make as much of a difference in the world as I would have liked. I've spent most of my life in school, learning things and preparing for my future, and while I think that's valuable, I'm not sure I could consider it worthwhile if I died today. I tend to be a very future-oriented person, and I've made a lot of short-term sacrifices to benefit my longer-term career goals. Thus, I can't say I enjoyed my childhood as much as I probably should have, and yet, if I were to die today, I would also feel like I wasted the time and energy of those who educated in me, invested in my future, etc.