Do you believe living happy is more important than reach your potential/striving for success?

You're not wrong. There is no "right" and "wrong" when it comes to this subject. Whatever works for you... Except you're living in a world-culture that values "work" and "success" over quality of life, and most people don't challenge it, so you may choose. Sometimes we have to make sacrifices in order to find our own satisfaction, especially if our idea of success differs from the norm. You may define your own idea of success. And you might have to work the system for a while, to eventually get what you want. That's what I'm gonna have to do, because I was not born rich, and I'll need enough money to survive on, regular healthcare, that kind of thing. What makes you happy?