Well I guess I made the first comment about V8's being a bad configuration for F1 engines.
F1 brands itself as the pinnacle of motorsport. The cars are totally out of the ordinary, open ****pit with 13" wheels, wings, everything about them is totally weird which gives them an exotic feel. A V10 is a strange engine configuration and assists F1 in marketing itself as the bleeding edge of automotive technology (regardless of the truth of the matter).
I love V8s, 355, LS1, Cosworth ED... whatever, but they are familiar and somewhat ordinary.
F1 cars should be out of the ordinary.