The older you get the more ambivalent you become.
Everything you want is counterbalanced by costs and consequences and long-term thinking.
Everything you work toward is besotted by immediate and pressing concerns.
If you choose something out of passion, you'll regret the long-term implications.
If you choose something out of a clear, missional sense of the big picture, you'll regret your eroding sense of passion and excitement.
The good news is that regret and satisfaction can coexist harmoniously like a delicious dish whose bitterness is unmitigated by its richness, and vice versa.
Am I saying that eventually you develop a taste for regret? Maybe. That's a question that I should pose in a letter to future-self, though. I still don't like the taste.