Manipulative people definitely outweigh the non-manipulative in this world.
For awhile I saw it as a desirable trait; getting what you want under your terms. But after being a variety of relationships with these types of people, I decided they're not very fulfilling at all. No matter what, you'll never be even half as important as they are to themselves. And that's no fun.

Keep the manipulators at a distance; and reserve your close friendships to genuine, earnest people.