Oil paints and pastels.....

I will be carrying Gamblin Oil paints and products, and I think Schminke pastels. I would really appreciate if people would let me know the color preferences, from the more commonly used ones, on down the line.
I have to order a few colors at a time, so the more popular ones is the place to start! Thanks for reading, Things are going well, thanks to all of you supportive artists out there!