I love the different interpretations of Death, especially by Neil and Terry, respectively. They are good.
Mine is...a bit different. Okay, so people perceive Death as a black-cloaked figure that's ominous-as-hell for a reason, right? So, I figured that there is not one, but a succession of Death-beings that exist beyond life. (Sort of like how people believe in angels and devils, this is the idea that something else is out there.) They would be seen as dark-cloaked beings, no visible legs and gnarled hands, their faces mostly not-visible because of the pure shadow enveloping the skull-like face. There'd be white-glowing eyes, though, and it would give reason for the Grim Reaper folklore. Except...no scythe. Never a scythe. Just a cloak with sleeves, that grim visage, and the hover. UNDERNEATH THAT is a soul-eating creature capable of delivering the cold embrace of death with a terrible white lightning.
My imagination is a horrific one. This is only an interpretation, but it's one I happen to like.