I've been leveling my Unholy DK again, and it reminded me of how much I love the spec. It seems like hardly anyone plays it, and I can't imagine why. You get some sweet things that Frost doesn't get access to, like a pet stun and a badass gargoyle. I think the rotation works better than the whack-a-mole procfest that is Frost, too.
I've been noticing more and more though, man there are some horrible DKs out there. Had a Frost DK yesterday that somehow managed 12K DPS on 10m Feng. He was using Death Coil instead of Frost Strike, running Unholy Presence (for the movement buff maybe?), and not a single Obliterate or Soul Reaper. He eventually got kicked from the raid. Today in a heroic, we had a Blood DK queued as DPS, running in Blood Presence, dual wielding, and wearing Int/Spirit boots. His damage was so pathetic I didn't even notice he was running in tank stance until I targeted him. And naturally, he needed on the agi/crit trinket. Boggles the mind.
I mean, I can understand why even semi-decent DK players can seem like window lickers, because the most popular spec, Frost, has bright lights flashing up on your bar nonstop. But come on, some people can't even do some reading to understand the basics.