I have a confession to make...I only own one eyeshadow palette. And I use it every day.
It is a no7 eye compact and contains the colours Vivid Violet, Lilac Sky, Tender, Island Sea, Comet, Innocence, True Gold & Truffle. My favourite colour is Tender (top right) as it is very nude but shimmery at the same time, perfect for work. My second favourite is true gold as it is still subtle but adds a little more colour.
If you havn't tried no7 eyeshadows I reckon you should as I think they are very underrated. And if you are wondering, tonight I am wearing Truffle!