I collect this line mostly cuz I dig the techno fantasy theme, and cuz I like the designs. i don't necessarily need to know a character to enjoy them (Optikk for example, is pretty fun, even though I know nothing of the character), thus far there hasn't been much that hasn't piqued my interest, though as they get more and more obscure that may change. I don't mind a little POP and NA, the cooler looking ones like the Mutants and Horde dudes are great in my book, and a few of the heroic characters like Bow (who turned out awesome). On that note, I'm pretty much down for any and all of the villains, they're so much cooler visually than the heroes when you compare the two factions.