Hardcore Team Death Match, because It doesn't take a hole clip to kill someone and there is no map at the top of the screen constantly telling you where people are.
Hardcore and the#1 reason is lag! Lag is so bad on core. That being said I still play alot of core with friends and I love TDM on Hardcore and CTF on core
Hard core all the way. I can't stand putting a full mag into someone and still not killing them. Besides that people in core have found out that snipers are one shot guns so in the clan ops that's what most of the teams are using.
I prefer core myself. I think hardcore is a place where people just sit and camp all match. I really enjoy league play on this Black Ops. The game types that stick out as my favorite right now are Hardpoint, Domination and Team Deathmatch.
I highly prefer hardcore, but have played more core purely due to the fact that that League play is only core. I've also been trying to play with some more of the clan members and thus I have played a bit more core. Overall I prefer HC:TDM.
I prefer hardcore, however with black ops 2 there is a limited selection of gametypes. I am a big fan of domination so i end up settling for playing core 99% of the time.