Another discussion question!
What's your favourite pigment for painting?
I love Iron Oxide Red because it is so useful for making skin tones and a range of browns (when mixed with blacks, etc..). It is also super lightfast, extremely opaque and very cheap.
Do you have a pigment you love too? Perhaps you like Ultramarine Blue for the rich colour, or Burnt Umber for how useful it is?
Maybe you like the moodiness of Dioxazine Violet, or the brightness of Phthalo Green?