Both the paint jobs are beautiful! I personally prefer gold over yellow since I just think it makes more sense that that's what she would be wearing, but hey, since I don't have (or plan to) own Celestia I'm not sure how much my opinion counts. I've been planning to paint my Luna's booties to be silver though (I don't even recall what color they actually are in the show) and I think adding paint just overall makes the ponies look more finished. Sort of like a DIY project!