I personally would love to read about green lanterns that are not human, maybe a prequal about Abin Sur.
It really does depend on my mood, I think. In general, I think I am drawn to very character-driven stories with tight plots.
As far as some of my favorite books, I’ve always been a big Green Lantern fan as well. The introduction of the Blue Lanterns was absolutely wonderful writing and I get excited every time a Blue Lantern makes an appearance.