Good article, but you have to be careful who you hang out with.

If you hang out with people who are too negative, whilst you may grow spiritually (i.e. learning how to practice midfulness near them so they don't infulence you too much), you won't be growing too much as a person, as some of your energy is being sucked away (in my experience).
But I do agree that some contrast in personalities is useful for general growth and learning to appreciate differences.

Thanks for posting