Well ya knoooowwww...it kinda strikes me that posting the highly figured tops is kinda cheating - or at least it's not answering the question. Like frinstance, the bubbling mudpot sulfur-burst of Tonart's first pic would knock ya dead at five paces in ANY color, and if you saw any of those shades of gray as a solid color...it might be meh, or it might be
nice, but it wouldn't be
OMG. (Also, while it doesn't take a thing away from the splendor of that piece, it wouldn't be far off the mark to say it looks a bit like a chunk-o-pearloid from a 60s kitchen table. Or Ludwig drum kit. Hey, not that I have anything against that stuff!)
Likewise yon yellow-green dragon's eye further upthread. It's not the color of those guitars - or certainly not the color alone - it's the magical planks-o-wood, enhanced by the PRS colorists' voodoo.
So it's hard to answer "best PRS color," because (at least I find) the figure of the wood on a particular guitar plays such a role in the judgment. A color that looks fabulous on one particular top might be soso or
yuck on a different top.
That said, if pinned down and forced to generalize, I'm probably not far from Gary's point of view:
Faded whale blue followed closely by Red fire burst
Those are the colors I gravitate toward...any reds or blues, really, but the FRB especially and Whale Blue, when it truly looks whaley. Same colors I lusted for in unattainable Corvettes of the 60s when I was a mere lad. Might be a function of the second adolescence I'm going through as an old guy.
But for all that, because I've chased particular versions of particular SEs, I've bought the colors I could find them in - and I have ended up with more Vintage Sunburst and Tobacker Sunburst than I would have gone shopping for. Of course they're safe, traditional, and woody colors that automatically look "right" on a guitar, and I'm OK with them. If I had to choose among those two, I prefer VSB. It's hard to avoid conventional-bursts if you chase guitars at all.