One day you'll realize that those opportunities with the opposite sex that you've been blowing off because you had "better" things to do... Well, those opportunities only exist in the past.
Regrets are almost always about things you didn't do. Almost never about the things you did do.
I'm trading money at my 30s with love in my 20s. So I don't think I'll miss much. I'm afraid I'll be obliged to take a job in my 30s since odds are I don't have many options to start a startup. However, now, I can take more risks for that, since I don't have any obligations.