Thematically Appropriate
I mentioned last post that I had an army theme. It's probably worth elaborating on a little. For various, not overly interesting to anyone else roleplay based reasons, my army is going to be a necromancy only army. So no vampires (in a Vampire Counts army!), no vampiric things (like varghulfs), no units I think are ugly and certainly no living things! (Beyond the necromancers themselves, that is.) It's probably (definitely) not the best way to play a Vampire Counts army, but I'm not playing to win, I'm playing with friends. (This may change. I'm a competitive bugger.)
So what am I allowed then? Well, basically it's skeletons, zombies, skeletons riding things and spirits (there are quite a few of these). Largely, we're talking non-sentient undead. Your classic shambling hordes, backed up by some ghosts.