No, this is how I envisioned him--stooped, pale, Lovecraftish...I especially like the candle-wax dripping over his fingers! For myself, I would have had some cobwebs clinging to his robes--not TOO many, just enough to let us know that he just came out of his catacombs...not too late to add some, is it?
So, what's next on your agenda? If you really wish to evoke REAL Horror in Literature, read The Throne Of Bones by Brian McNaughton! He was a CAS/HPL fan, but his tales have a twist all their own, particularly The Retrograde Necromancer; Lord Vendriel Vendren is one of the most evil (yet oddly comical) sorcerers ever! Believe me, if you read this book you'll have LOTS of inspiration...
I'm currently working on the Phantom (erik) from phantom of the opera, after that I have a William Hope Hodgeson story I want to draw from. Haven't looked much further than that yet. (well of course I will draw cthulhu before I finish the series.
Never heard of Brian McNaughton, I'll check him out next time I get the chance. thanks!