It's hard not to love Malcolm McDowell.
He's equally good at playing the nasty villian as he is at playing the good-natured guy. Although, most would probably say that his villians are some of the best they've seen.
He's got a truly excellent voice which, fortunately for us, he has used to provide characters such as Metallo and Whistler with a distinct sound.
Malcolm McDowell is a wonderful actor. I'd personally watch anything that he's in, no matter how small a role he plays.