Insurance, Business, Medical Niche gives you much but don't forget to implement genuine content to get maximum revenue
I recently started the social networking site for project managers and that seems to have very good Click value.
I would not go on the mainstream keywords - look around and find a good combination, use adsenseheaven keyword lists and oh well, im sure you know where to go from there
That's not good... as... a)it doesn't even pay that much... b)too competitive... and c)it's a morbid thing too blog/write about; plus, you could only write up 5 or so things about it before running out of things to discuss anyway. Best paying subjects to cover here in the UK are Credit Cards/Loans and Insurance. Not easy to compete though with all this lamo price comparison sites taking all the business.