Funny coincidence... I just finished reading a Merlin story in which Merlin gives up his immortality to bring Gwaine back to life after Morgana kills him. And it's Guinevere who kills Morgana, using Excalibur.
Heroes get better PR, but they usually get stuck with the funny costumes.
I've always preferred the moral grey area, since some heroes can be so good that they lean all the way over into evil (anyone who's read the Kingpriest trilogy of Dragonlance novels will know what I mean), and some villains do come with some honorable traits (for another example in the Dragonlance universe, I refer to Steel Brightblade, in the novel Dragons of Summer Flame).
The Harry Potter equivalent would be Dumbledore and Snape. Dumbledore really isn't the hero that fans are led to believe, and Snape has believable motivations for being a jackass to the kids (not that it's a good thing, just believable) - and he does his best in an impossible no-win scenario.
Or if a more immediate familiar example would be preferred, there's always Frank Herbert's warning in Dune: Beware the charismatic leader (iow, Paul really isn't the hero of the story).
So I can't really cast a vote in this poll. The best hero/villain stories always have shades of grey.