I didn't like the shadowlord in FFXI, his motives were quite shallow as was his reasoning for doing the things he did, he was the typical "Heartbroken revenge" villain archetype. He didn't have much of a personality either. We all know of the Raogrimm sob story that turned him into the shadowlord and he was consumed by his hatred. He was just too cliche to me, and as far as villans go, all he did was sit on a throne, no actual means on motives, as he was more of a:
"I'll just sit here and do nothing" kind of character
Now Nael Van Darnus (What a man! lolz) even though he's rather cliche as well with the whole (Imma destroy za warudo!) He rules with an iron fist, he believes what he does is for the "GREATER GOOD" even if it is otherwise, the fact that he considers us guilty by association is what makes me think "WTF is up with this guy??" I loved the fact that he was able to fulfill his motives using others, and even in death, his motives were complete.
He also has manners... and he's an elezen so that's extra points with me.
(If only I could see what was under that helm)

SWAGGER!