Confession: I have an odd tradition when it comes to making a new death knight. I have to kill Rayne during the Battle for Light's Hope Chapel.
I haven't made that many DKs - Morgion, my dwarf on Moonrunner, a worgen on Azuremyst, and another dwarf now on Medivh - but every time, I make it my mission to find Rayne in that mass melee and strike her down.
Morgion fought the whole battle, of course, since this is when DKs were new and the battle was truly epic, with 20+ other death knights there fighting too, but on all the DKs after I just kill Rayne, then sit around waiting for the fight to end.
I don't even hate her or anything like that. I just feel like she needs to die. I think the first time I did that quest, she caught my attention because unlike almost everyone else, she wasn't wearing armor, but rather bright orange/green/purple robes. Talk about making herself a juicy target!
Also, I noticed her because she was casting Wrath IN CASTER FORM. This was a display of incompetence that HAD TO BE PUNISHED!
And so, every time, I track her down and murder her. Sorry, druids, but she has to die.
Of course, it is but a temporary setback. When Tirion does his rah-rah-we-win appearance and saves the day, she miraculously comes back to life and is standing there with the rest of the Light's Hope NPCs.
Alive again...for now.