Enforcer
Explorer
I voted for World of Darkness, but I only really ever played Vampire. That game is just too cool, especially if you can manage to tie your players into the insanely complex metaplot that permeates the setting. Getting your players through an adventure based on diplomacy and intrigue is one thing, having their actions reflect the wishes of a 1500-year-old Methuselah is another...
If only there was some credible way to convert it to d20, but given the power of generation and age, I don't really see how.
As a close second place I have to go with Shadowrun. The richness of that setting is enormous, though I think the addition of otaku and other nonsense like that made it a lot less credible. At least it's definitely convertible--unlike other posters, I think rolling a bizillion dice every second is ridiculous, though the way they do armor makes a lot more sense.
If only there was some credible way to convert it to d20, but given the power of generation and age, I don't really see how.
As a close second place I have to go with Shadowrun. The richness of that setting is enormous, though I think the addition of otaku and other nonsense like that made it a lot less credible. At least it's definitely convertible--unlike other posters, I think rolling a bizillion dice every second is ridiculous, though the way they do armor makes a lot more sense.