Now this is what I call a hard choice. Two really nice baddies of about the same rank - they are both disgusting, in a way (I would not prefer to having them as friends, really), however, on the other hand I can still sympathise with them in some way (it would be cool to work with them - i.e. occassionally seeing them, as they'd have their own field of work - in Isengard/Cirith Ungol... although the latter is not a place I would like to be in that badly... Minas Morgul would be far better). They are both interesting characters, and really good villains.
Hmm... I have to choose yet