I, too, think "best" apart from the obvious "iconic" liveries is certainly attributed from personal/emotional experience.
To be honest, I wouldn't opt for many of the liveries presented here. In general, i prefer quiter liveries with hued base colors. Also, i am totaly not a fan of huge sponsorships besides i am aware that most of our "icons" exactly have this in common.
However, throwing my hat in the Ring. As one may notice, a heavy contemporary German - racing Influence cannot be denied.
The first GT3 Z4s appeared when i started attending NRing races regularly
Later becoming "glowing in the Dark"
http://www.andyblackmoredesign.com/w...ubai_night.jpg
But it's a sharp car anyway which sported a lot of nice looks
http://lesvoitures.fr/wp-content/upl...cing-Front.jpg
I quite miss the orange works design porsche used for a couple of months
Would suite the current cars as well imo
Very appealing also the 2014 R18. I love the thecnocratic look of it, totaly matches the complexity of the cars.
Current Astons look gorgeous
These two Badboys were already named
There also was a chrome-ish McLaren runnig BES a couple of years ago, but i can't remember who fielded it...
Interestingly, apart from my bias towards cleaner looks, i am a huge fan of art cars of any kind.