I use both, I have found with Squidoo that Amazon and Ebay affiliate sales are the biggest earners. Adsense doesn't really make a lot unless your site stays (on average) in the top 2000 sites on Squidoo- not an impossible feat by any means, in which case that lens will make roughly $30. If not in this popularity bracket, it will make cents, if at all (not including affiliate sales of course).
Hubpages payes well through the adsense program. I would therefore suggest focusing your sales based pages to Squidoo, and your high traffic informative pages to Hubpages to maximise revenue. It seems that it is easier to get a hub to the top of google than it is a lens.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.