I agree with Foxy, I like the way they’ve kept the overall theme the same for the last few years. I also think that the current livery is the best one yet, the dark blue contrasts well with the red bull and yellow sun and the metallic finish looks great in the sun and underneath the spotlights too, the stripes also add a nice retro look to the car without making it look old fashioned.
From a marketing perspective I think the fact that the Red Bull Racing livery stays roughly the same and is very similar to all of the other Red Bull sponsored/owned teams in many other series and sports is a very useful marketing tool for the parent company as there’s the added prestige of F1 then given to those teams and the company by association (even if it’s only subliminal for the majority of us).
It also gives their merchandise a nice look, especially the clothing which I think is some of the best looking in F1 at the moment (after Ferrari, of course). I got a Red Bull t-shirt as a gift and when I wore it to work on dress down Friday all of the fashionably dressed young guys (of which I am not one) were asking where I’d got it from. That’s not the response I get wearing other motorsport related clothing :-)