DEfinitely Virgin. The pictures rally don't do it justice, when you see that silver glinting in the sun. AA would be cool on a 747. For understatedness, I like UAL's scheme, it paints a picture of a 747 ready to get down to business.
EL-AL's old c/s
It was magnificent: elegant design and striking colors.
I was always deeply impressed when seeing one of their planes, and of course particularly when it was a Jumbo;
the light blue was so beautiful, no photo is able to reproduce it, and I'd like to have some of the original painting!!
My favorite 747 standard scheme would be KLM's for both their 747-300's and -400's. I also like Virgin Atlantic, Air New Zealand and Northwest's color schemes. I like almost every special 747 color scheme. Imagine a Lan Chile 747 in their new color scheme. That would be something worth looking at!