BB9 closely followed by BB7. The rest are good except the BB8 one which was just an awful monstrosity that deserves never to see the light of day again and BB2 just looks silly without the pupil in the centre. The BB4 one was good, but it looks better in greyscale, and I like how the BB5 and BB6 ones never stuck to the template. Thats them all apart from BB3 mentioned which I'll mention now, simple yet effective
