I voted no because i'm sick to death of the imbalances in the game, hardcore just amplifies them. In softcore, the weapons are "balanced," whereas in hardcore, all weapons are more or less not balanced at all. I can shoot the grach at someone on the island in isle from the sniper hill and drop them with pretty much no problems at all, because it only takes 3-4 hits. In softcore, doing something like that screams "HAI, SHOOT ME IN THE FACE PLEASE!!!" Another issue with hardcore is that people tend to just spawn camp and sniper a hell of a lot more than in softcore.
I personally enjoyed HC in the COD4 division, it was amazingly fun and competitive; however, this game is far from ready for that sort of playstyle. They need to fix some issues with hit registration, remove some buggy mechanics, promote actually attacking the objectives, etc... before HC will be viable in my mind.
If we do decide on making HC servers, i'll play on them, but i'd swap to the softcore server as soon as a spot opened up.