I think you're missing the personality differences. Several of the ventures I've been a part of I joined simply because it looked like such a challenge. I enjoy pushing the limits of my mind, of what I know and of what I can do. This isn't a "do it the hard way because it's more fun", it's finding that simple, elegant solution to the impossible problem, or like a touch of red pepper in spaghetti sauce to give it that tiny kick it needs to be perfect. If you're trying to sell people on your idea to be co-founders, they aren't the right person. If you tell them and they start talking in plans and ideas and acting like it's their idea, too, you have a good co-founder.
