Don't get the cart before the horse. Build a good useful site. Then see how you can monetize that site (AdSense might be an option).
I think people who decide they want to make money with AdSense then go looking for some content to throw up and call it a site will usually end up frustrated and/or disappointed. You can see it in some threads here.
And some of them will then resort to practices that will eventually get them banned thus more frustration and disappointment.