As a single individual, so it can be more character driven, and make your character a lot more unique and flavorful, like a converted miniature.:CHappy:
Also, having a plot laid out beforehand, or a Dm would keep things on track, and help save it from death and fail.
just some Ideas, and maybe open up the race options, maybe make it a desperate alliance between gaurd and eldar, or a renegade sect of tau get involved, let people really get into exploring their options.
Say I want to rp an orc with you guys.. maybe he's extra smart and sivulized.:CHappy:
Don't totally kill canon, but make it more open ended. This isn't offical GW stuff here.