Along these same lines, I've been kind of wanting to play my goblin character in Eorzea, but in the context of being a Lalafell. They seem to have a fairly enterprising nature, judging by the Lala I see around Ul'dah. I don't think having one be a greedy little jerk is too far off the mark. I just have to come up with a whole new backstory, since, well... He can't really come from a volcano-wrecked island of pollution-spewing engineers.
I would certainly be interested in playing a villainous role. Back when I played WoW, I was in an "evil" guild who were allied with the dark cult that drove much of the nasty goings-on leading up to and part of the Cataclysm. It was a lot of fun playing evil with a group that didn't overtly go about declaring their evil-ness in MWAHAHAHA-ing, moustache-twirling villainy.