What is the matter with the haters?! I think your art is awesome with awesome sauce on top. Great work! I've just begun doing customs as well, and honestly I find a white palette even harder to work with. Beautiful.... I can hear 'da da da da dummmm' playing in my head.... (Phantoms theme song)
I would have loved this a lot more if the pony had been a dark red or some such to start with, either with actual factory colours, or a base paint. The white of the mask, and the mask itself, is a very important piece of the Phantom. White is nice for a body colour to get the symbol on the rump to really pop, but it also could have done the same with a dark red, sort of the 'point of no return' kind of setup. Mostly, I'm sad that the mask does not pop as much as everything else about the pony. It's still a GREAT job, like all your customs are. I hope to be as awesome of a customizer as you one day (I doubt I'll reach your level though haha), but what really would have sold me on the utter brilliance of this pony was if the mask would have popped better than it's doing. A do think that a "dark red/point of no return" version of this would have been a striking example. (If you've made one of those, I haven't seen it. But this is still beautiful, no matter which way you look at it!)