first of all, i'd recommend getting a bunch of pigment samples from someone trustworthy (for example: NOT on ebay), because it allows you to get smaller quantities of more colors, then you can purchase larger sizes if you like the shades. a 1/4 teaspoon sample lasts quite a few uses, and samples are a great way to try new colors. some of my favorites are:
vanilla and melon as light shimmery highlight colors.
deep blue green, grape, ruby red as darker crease colors.
blue (either RR or original), bright fuschia, acid orange, coco beach, golden lemon.