My favorite nail technician always gives me a little bit of a hard time when I hand her multiple colors, but so far she hasn't fired me! I think she was tempted to when I gave her 10 different glitter colors for my Christmas pedi - a different glitter on each toe.
My most recent mani: Manicurist of Seville (OPI) and a nice gray from Essie (I can't remember the name of the color though)
And, my most recent Pedi: My Pal Joey (OPI Hello Kitty collection) and a multi-colored glitter from OPI (I can't remember the name of the color though)
Metallic gold - Essie
Turquoise and Gold Glitter - opposite order on each foot
Red/Burgundy ombre - opposite order on each foot
Gray and fuchsia
Hot-pink to blush ombre
Have fun with color! It's the best!