You know what I hate? Bloggers who sell their souls and post what seems at first to be a heartfelt post about how much they love someone, but in the middle, they mention a product, with a link, and somehow tie it all together. That is not a blog- that is an ad.
Even if it got to the point where my blog had a lot of readers, and advertisers were offering me the $$$, I don't think I would ever do that. (Notice I said I don't *think* I would). Money is so evil.