bionicle to me are like action figures, albeit a lego version.. there is only so much you can do with it because each piece is clearly set out as to whether its a leg, foot, torso etc.. and all you can really do is stick other technic bits on to make guns and weapons or whatever... exo-force on the other hand is much better because you can use any piece at all in your collection to make what you want, and those joint pieces are so awesome... the ones they use as shoulders/elbows/hips/knees etc... dunno what to call them... thats just my opinion anyways