I'm obviously not an Empire supporter, so I won't argue the points stated as to what you guys think of him, but I will point out something that I feel those who do like him seem to overlook:
http://cs.uesp.net/index.php?game=sr&formid=0x000c347c
The Legion's always been here. Without us to keep order, the provinces would fall into barbarism and lawlessness. Especially Skyrim.
-General Tullius
Which to me sounds a lot like http://www.thefreedictionary.com/white+man%27s+burden, just replace "white" with Imperial. It's just a reflection of the Empire's attitude in general, which is they need to give others their culture and laws or ^. Which colors my opinion of him greatly. When I was an Empire supporter a long time ago, I found him to be bland and boring, but I liked the voice actor.