I don't own many MAC lipsticks. I love the vanilla smell and the shade range but I find them to be on the drying side. That being said Shy Girl is a great wearable shade for everyday.
Shy Girl is a nude peach with a cremesheen finish. I can usually get around 3-4 hours of wear with this lipstick. As I find it drying I like to apply a bit of lip balm underneath as it tends to highlight any dryness on the lips and can apply patchy. I like this shade though as a lot of nudes can make me look washed out but as this leans more to a peachy nude its more flattering!
Let me know your favourites MAC shades - I need to take back some empties to get a freebie!