I've thought about this a lot over the years. A few readers have pointed out to me that I write a lot about outsiders. And I seem to have a weird empathy for bad people. (Those two elements really dovetailed in my Thanos novel!)

The outsider thing is probably the biggest thread. It doesn't really apply to my Flash books or some of the standalones, but it's probably a fair answer!

I also like to think that I try to do the unexpected in my books. I'm not talking plot twists, necessarily, but more like those elements that make you go, "Oh, wait -- I thought this was Story Type X, but now...I'm not so sure!"