Yeah Ice/DM is deceptively awesome.
Sure, your resists are harder to come by but at the same time you have a massive 50%+ recharge reduction + slow aura, a flat aoe 15% damage penalty, heals for days, a spamable aoe terrorize with a hefty -hit penalty attached. 2 separate Endurance recoveries and a pretty phat damage booster not to mention that Neg Energy is not only the least resisted damage type, it's also the damage type that mobs are most likely to be vulnerable to.
Lets not forget about hibernate at the end of the day either.
And of course who can't get behind a shadow frost theme