I remember as a kid, when I first saw the OT movies (ANH and Empire in particular), Vader really seemed like a "bad guy", and to some extent, "scary" to a little kid. Not the "terrifying" type of scary, but more like there's no question he's the baddest guy in the SW universe. Granted, the OT is a story of his redemption (ROTJ in particular), but overall there was no question he was the main SW baddie.
Did the portrayals of Anakin/Vader in the prequels change how you look at Vader at all? Does it make the character better/deeper, does it weaken the character and make him less of an imposing figure? Overall, did the prequels change your perception of Vader for better or worse?