Have to go Dark Side. Not evil, so much as selfish. I'd abuse those powers for personal gain on a daily basis, no doubt, and Jedi gotta be all uppity about doing that. Still, no way I'd ever so much as enter a room with a Sith in it, because while it was mentioned some of them do work together, I'm not seeing me last too long in a back-stabbing competition. So Dark Side by choice, Sith by default, but not by association.