One of the best polishes for the Christmas season is China Glaze Glittering Garland. It is the perfect deep green with golden shimmer. The formula is great. I have on 2 coats with a coat of Sally Hansen Miracle gel topcoat to seal it all in. This can drag a bit which is the only problem I have come across whilst using it.
Glittering Garland makes a great base for nail art too. I used this a lot last Christmas and even during the year for regular nail designs. It's a polish that shows up on my blog a lot because of its versatility.