I'm only level 17 at the moment, however, when I reach level 55 I will be making a death knight. I play mainly as horde, I don't have any alliance characters on WotLK. I am looking for a guild that has flexible hours. I usually play from 12:00 AM PST (Pacific Standard Time) to 3:00 AM PST. Both PvE and PvP are fine I suppose. I played retail for about 2 or 3 months and got my DK up to level 85. I only had vanilla through cataclysm, although I was playing on MoP version I just couldn't get to level 90.
If you would like to know anything else please feel free to ask.