Yaw, Pitch, Thrust, Centre of gravity, Bah!! Your all thinking like those inferior human beings. My ideal race doesn't concern themselves with such trivialites because they've designed a ship that doesn't need to throw little bits of stuff out the back to move, or they are massless pure energy beings, or else they just like moving in circles.
I think what makes a ship look really alien (and thus cool IMHO) is if it doesn't make any sense.