Personally, I hated adsense. Unless you are a huge site it just is not worth it. And no one really clicks on those ads anyways even if they are on your site…I know that I don’t. Google is a huge corporation that is not very friendly. They are not out to help the little guy in the least bit. They will take space up on your site and maybe in 3 years you will be able to cash in that $100 check because it will take you that long. It is a depressing system that gives you pennies and not even pennies a day.
The thing with Google adsense also is that if a person goes on your site and tries to sabotage it they can just site there and click continuously on your Google ads until Google will actually ban you from their program! Adsense is all hype and no profit for the little guy..that is how I see it at least!