The importance of embracing feedback

I've learned a lot from listening actively to feedback and opinions, learning to identify the good one, and how to react to the one not being that positive and constructive. Difficult in the beginning not to overreact sometimes, but the more I was experiencing, the more skilled I’ve become. As with many things, it’s just a matter of practice. So what defines good feedback? And more important, how to receive it regardless of the type of opinion we are getting?