Any niche will do well with AdSense if you build a nice content site. Just pick a niche you know a lot about, write content, do some SEO and be patient. After a few months when you start ranking high for various keywords and your traffic increase, money will flow.
You can make money with any Niche, all you need is traffic. Traffic = $$$ Anyway, here is a list of high paying keywords, not sure how accurate the list is forums.digitalpoint.com/showthread.php?t=783358
you can start by finding a good high paying keyword. But then my suggest is find the niche that you are interested in. it'll make your easier to updated later