Eldar bad days tend to be a lot worse than Imperial Guard bad days, so I'm going to have to go with 'Commissar'.
I'd rather be in charge of a WAAAAAAAAAAAAAAAAAAGH than a Chaos War Band, as my Orky pride is too great for anything else.
I'd rather be by the Eye of Terror. I mean, there are Imperial planets near that thing anyway, right (if I have my fluff right)?
Now who would you rather go on a romantic blind date with: a Daemonette, or a Wych?
The first casualty of war is neither innocence nor truth.
The first casualty of war is always subtlety.