Yes, for those that read the =4 forum, this will be my second--and possibly main--class in WotLK.
I just got my own beta key from my contact in Blizzard to use on my own account, so my interaction with beta won't be just playing for a few minutes on my brother's account or a friend's account.
Here, much like my rogue thread, I'll be posting my experiences with the class, telling of my thoughts on race choice, quests, and talent choices for leveling, tanking (which I sincerely doubt I'll do, sorry to say), DPSing, and PvPing.
I'm 82% done with the beta client download, so you can expect some talent thought up fairly soon.
For now, here's my racial thoughts:
For Alliance: human > dwarf > draenei > gnome > night elf.
Humans are undoubtably the favorites, not only because of their expertise, but diplomacy and perception. Gnomes are overrated as a death knight as the class has ranged attacks (i.e. Death Coil), so snares and roots do not effect them as much. Also the Unholy tree has a talent quite low that increases the Death Knight's speed by 10%, which stacks with other speed increasing effects.
For Horde: undead > orc > blood elf > tauren > troll.
Undead as a race will make you nigh invulnerable to warlocks. With multiple fear breaks as well as Lichborne in consideration, undead is my #1 pick for Death Knights. Orc comes in a close second, but their lack of a strong second racial behind their expertise with axes makes me consider them about equal with blood elves. Blood elves are actually quite good as Death Knights; with their ability to almost on command generate 30 runic power, they have some tremendous potential. It hurts that they look awful and have terrible animations, though. Tauren are, as always, a strong race choice with War Stomp and 5% bonus HP. I personally am underwhelmed by tauren in comparison with undead and orcs, but they're still a decent race choice, especially compared to trolls. Trolls are just plain bad. If I ever see a troll Death Knight try and convince me they're a good race, I'll just laugh at them.