When people ask me who my favorite actor of all time is, I say Vincent Price. I could listen to him say anything. I've even sat through some of his worst films just to see what he will do. Of course it's not just due to the fact that he has an unmistakable presence on the screen - He was also an extensive collector of art, a hilarious person (as evidenced here), and willfully sharing of the spotlight with Muppets.
Vincent Price (classy to the end):