The "2%ers" are hard to come by. However, it's not only about finding them, their lifestyles and friends also have to be compatible with you. You find a person you really get along with, you both remain close friends for years, then suddenly that person enters a relationship with someone you don't get along with. Or they start doing drugs or get addicted to stuff you are not interested in.
Now it's time to move on because your lives are incompatible despite being a person you used to enjoy hanging out with.