Nail polish colorful & metallic

This season, are fashionable many shades of nail polish. In the trend are black color, metallic hues and bright decorative accents in manicure.
Look at these photos by photographer Simon Pais. They fully reflect these trends.

Which is better: a fashionable today black nail polish or a bright alternative to, for example yellow?

If black nail polish, you should look at:
- Nars Limited Edition Warhol Nail Polish - $ 24.56
- Butter London Lips & Tips - $ 15
- Opi Black Shatter - £ 15.95
- Illamasqua Generation Q Nail Varnish - $ 23.68
If yellow nail polish, then you should look at:
- Nars Thakoon For Nars Nail Polish - $ 18
- Chanel Le Vernis Nail Colour - $ 27
- Illamasqua Nail Varnish - $ 14
- Deborah Lippmann Shake Your Groove Thing - $ 18

Which is better: a fashionable today metallic nail polish or a classical alternative to, for example matte?

If matte nail polish, you should look at: - Bobbi Brown Pink & Red Collection Nail Polish Valentine Red - $ 18 - Illamasqua Rubber Brights Nail Varnishes - £ 13.50 - Butter London 3 Free Nail Lacquer Fruit Machine - $ 15 - Nars Andy Warhol Nail Polish - $ 18 - Opi Casino Royale - £ 15.95
If metallic nail polish, then you should look at: - Opi Skyfall On Her Majesty's Secret Service Nail Lacquer - £ 7.99 - Deborah Lippmann Moon Rendezvous Nail Lacquer - $ 17 - Nars Nail Polish - $ 24.56 - Butter London 3 Free Nail Lacquer - $ 15 - Chanel Le Vernis in Malice $ 27
We have selected the popular brands of nail polish. However, you can buy fashionable shades this season and at more democratic cosmetic brands. What shades of nail polish do you prefer: dark or bright, matte, glossy or metallic?