Have a look on them:
Renault - Renault:

Well, this livery reminds me of the good old "30 ANS" livery by Renault. Quite nice

BMW Sauber - Ferrari:

The old livery just with white-red-black. nice combination of colours but how will it look like with sponsors?
Mclaren - Mercedes:

Is ther any difference to the old livery of 2009?

Ferrari - Ferrari:

W3ll, ugylest car I've seen so far. The nose seems to be endless...

And why is ther that f***in' logo in the inside of the wing in the back?

Mercedes - Mercedes:

This car is very nice too. Dunno why but I like it (WITH MSC oO)
SO THIS IS MY RANKING:
1) BMW Sauber
2) Mercedes Grand Prix
3) McLaren Mercedes
4) Renault F1
5) Ferrari