You lost me with your first paragraph.

"Nice guys don’t finish last. Charm can get your long way from home. You can get a promotion at work. You can win the heart of your loved one, and become the soul of any party. Nature pays nice guys nicely, contrary to the popular belief."

Slick and charming are not nice guys, they are con men, posers. I will go back and read more because I like Teddy but I don't think you know what a true nice guy is. Look up the word charm and you might change your wording. Also the most charming are lying flatterers.