An observation i made is to use a theme that makes the website look "fuller" before applying, then swapping back. So say you want to generate press as your main theme, swap to fairy blog, fill sidebar widgets with some images leading to your articles (like your own banners), then apply. It's not humans anymore who look at Adsense applications, it's bots. they see things like "low" or "full". At least that's been my own personal experience lately, someone should experiment.