Hey guys,
I personally think that single coloured cars can actually look really cool as long as they are stickered correctly. Take Tricky's for example, His rides look awesome, because they are all 1 colour and have stickers well positioned and all in matching colours (white).
http://www.oswestryrcc.org.uk/Gallery_National18.htm
Personally one of my views is that even the best paintjob in the world can look poor if it's not stickered right!
As for the looks of cars in general... well... everyone has their favourites, but let's face it, to an onlooker, anythin that flies past you at 35mph in 1/10th scale looks pretty impressive!
Yardy