Google Ads I've put on my koszek.com once. Then while doing some layout changes I saw all sorts of things being displayed. Some really inappropriate -- in my Google Summer of Code writeups I got some ulcer and sex-related ads. And I removed it then, never looked back. Not worth compromising your quality.

Right now I only use Amazon Affiliate and I guess only because it's (a) easy to get a link to the books I review (b) they are actually controlled by me, at least in theory. No flipping products Amazon is randomly sending me.