ok in my opinion i think the best enemy created is.......The Flood. I mean the flood shows many different traits like sometimes they will shoot you then next thing you know you have a combat form flying through the air towards you. Thats one of the ways i like the food, you never know what they will do which creates an unforgettable experience. Also bungie did a great job making the flood have a backstory, while unlike many modern shooters bungie did an excellant job making the flood have a whole storyline.I also find the flood very interesting i mean what other enemy enters a fallen teamates body, snaps his neck, mutates him, then turns him against you?I dont see russians doing that do you? And thats why i think the floods the best enemy created------>.<------- PERIOD