My favourite nude/neutral is Nails Inc's Cromwell Road. One coat gives a your-nails-but-better finish and two gives an opaque, very light musky pink colour. The bottle itself is getting a bit tatty around the edges from lugging it everywhere as it's the polish I can always fall back on.
On my toes, another Nails Inc offering in bright orange, perfect for the sunny weather! This would look great against a tan, but is also surprisingly flattering for fair skin. I love this polish more than I first thought!
What nail polish colours have you been wearing?