I posted this in another post like this, but there is evidence Bungie might include this. Look at their concept art (especially their Warlock wallpaper). It sometimes has someone using their left hand, as well as the Warlock seems to be sporting the fact he's left handed. I take this as evidence, however I wouldn't take it as fact because its just concept. Bungie does love us and want us to be more immersed into our character so what better way to do that than to make us use our actual dominant hand in game? Anyways, do with the info what you will, I think it's possible this time round. -MJ Rookie.