I chose the bottom option, but it's not really random. Ever since Jedi Academy, when I could choose not only gender but morality, I've often replayed, and almost universally play male good guys, and female bad guys. My Fem Shepard is pretty vicious and self serving, but Man Shepard is open and forgiving. Fable 2, my male character was a symbol of goodness, but the little girl I played grew to become a murderer and a vandal. I'm not sure why, but that's how I roll.