I've been at it for over 6 months and I have come to the conclusion that adsenses 336x280 ad block is the best on the net. It get's high CTR and if you plug it in directly under the main title you get some serious clicks.
It's just big enough and nice looking enough to get those clicks. Anyone else agree with me or disagree for that matter. I just don't use the other ad sizes anymore thanks to the 336x280. the 300x250 works well too but not as good as the 336x280.
Comments ? Experiences guys ?
Would agree with you totally on this one. Just take a look at any of the big popular blogs and you'll see they all use that ad right under the title. the 300x250 is better in the sidebar and the 728x90 is great as a header or even footer banner. I usually reserve the banners for other CPM networks though! Adsenses, text ads convert way better.