Had a look at the Kits... (slideshow of all known ones is
here)
It's a pretty good year imo, but it depends what you make of Adidas' retro trip. I quite like them, esp Colombia, Spain and Argentina. The non-retro ones are typical Adidas, some solid, some boring.
Nike seems to be going for the classic look mostly with England, Poland, Croatia (hard to mess up) and Portugal, France has...interesting sleeves which look awful to me but it's a matter of taste I guess. Some of the smaller nations have flashier kits, esp Nigeria (Aussies and Koreans to a lesser extent).
Uruguay seems to be using the sames kits they've had in 2010 and 2014.
My least favourite kits are probably Egypt, Iran and Tunisia (super boring), I probably like the Mexican and Serbian whites best