1. Vex 2. Hive 3. Cabal 4. Siva 5. Taken 6. Fallen The Vex are still very much a mystery to us, and I'd like to see more of them. Go back to Venus and see how they started there, actually SPEAK to one...not just have it go full R2D2 with my ghost. The Hive, well...with the book of sorrows we were given a very large picture of how their society works. Things like the sword logic were cool, and having the hierarchy explained to us was awesome. I'm really intrigued by the Cabal. Gaul showed us that while yes, the Cabal are still very much a sledgehammer, there is still some political intrigue going on. Then you have things like The Almighty and The Leviathan...star killers and planet eaters...I'd say I'm interested. Siva, more because I want to use it to make my gear (and my Exo) stronger. The idea of a Technological "Dark Side" was really cool to me. Taken...I liked fighting them, they offered some new combat dynamics that I enjoyed. But I wish we would have had armies of Taken that were composed of the other conquered races, with some familiar faces mixed in. The whole idea of "You were weak, now you're strong" wasn't super interesting to me. Fallen are just vermin. Scavenging what they can in a feeble effort to survive. They were all but eliminated before we were even resurrected by Ghost. To call them barbarians would be an insult to barbarians.