If you regret, then you obviously never tried. If you are embarrassed, then you obviously failed at accomplishing the objective. Regret is one of the strongest negativity there is to emotions. It leaks into your brain, and creates this painful cycle that nobody goes through through your entire life. Embarrassment is only felt as a moment then recalled back as a stepping stone in the better you with courage to hold strong upon. Now I ask you: would you regret or would you be embarrassed?