re: MAC Pigments that you LOVEWell I have to say that for the most part, I LOVE all the pigments I have but I'll cut it down.
Helium: BEST PIGMENT EVER. So it's crap as far as payoff goes on the eye. But it is so versatile. I love the red duochrome which makes it a perfect blush for someone like me. It makes an amazing highlight for the eyes, and mixed with Pink Pearl does well anywhere.
Jardin Aires: So versatile. This is for me what Vanilla is for many other people-it's a great neutral without screaming neutral. Mix it with Pink Pearl, Helium, or anything.
Mutiny: I love my blues and this is such a nice bright sky blue. The payoff on this is blissful, and you could feasibly use this over a Paint as a shadow.
Aire-de-Blu: This is not a beginners pigment. There isn't a ton of payoff with it; it is very light. It also is not as frosty as say, Jardin Aires. It's a different sort of texture in that it balls up a lot more and it's not flaky like say, Jardin Aires. This is amazing for doing soft, ethereal looks. I can see why it came out with Danse as the shadows in the collection were softer and this is very soft. Very light true blue with silver sparkle.
Golden Lemon: This is love. Frosty golden yellow...need I say more? I use it whenever I do a tropical-inspired look, and it's not overtly yellow so I can blend it out as a brow highlight.
Violet: It looks dark in the jar but it is so beautiful. It is what I go to when I want something simple-a light purple or a white shadow on the lid and this in the crease. Works every time.