If it helps, energy really really should be worked on. Do that. Also, that's not really how regrets work. You will be comparing the path you took to what you imagine to be the roads not taken. It's very dependent on your own unique experiences and outlook, and very hard to safeguard against. Your way of evaluating your life will change over time, so optimising for your current values gives no guarantees. Best thing t…
My philosophy: make the best choice given the information you have at the time. If you do, you have no cause to regret anything in your life. Thinking of alternative paths you could have taken might be a fun exercise or could yeild insights to make better future choices, but if you chose the best you could, there is no sense in regretting a choice, even when that choice hurt.
I think of this concept as similar to the excluded middle in logic. In hindsight, a decision is apparently either good or bad depending on the outcome. But it’s impossible to know the outcome with certainty the vast majority of the time. So a decision needs to be judged in the context of the information known at the time of decision - which does not include the information about the decisions outcome.