My "I Will Absolutely Croak When/If These Are Gone!" list
1. 180 brush- perfection for minerals
2. Trax
3. Satin Taupe
4. New York Apple
5. Rich Ground Fluidline
6. Shade Fluidline
7. Rose Pigment
8. Mystery
9. Blue Absinthe (I have a backup, too; the only shadow that I've felt the need to do this for)
10. Expensive Pink
Reviewing the list, I can see it is because all these items are extremely versatile for dressing up or dressing down and/or pulling double duty as shadow, liner, or crease color. Or in the case of the Fluidlines, I've used them as base colors for other shadows or just plain on the lid as the shadow. Rose is eye, lip and cheek color.