Not a fan of the black socks. A quick scan of the NHL uniform database shows the B's have never had a primary black sock.
I understand - and this story may be apocryphal - that Gerry Cheevers had a hand in the Bruins re-introducing gold socks. When the Bruins went back to having 2 sets of socks in the late 1960s, Cheevers requested the socks with the dark sweaters *not* be black because he would have greater difficulty tracking the puck. That was a different era with rinks not as well-lit, but black helmets/sweaters/pants/socks seems a bit of overkill. The gold balances out the black well, especially with the gold shoulder yoke.
But, outside of the quickly-dated FleetCenter sweaters, the Bruins can always nail the uniforms.
I hope, in 2018-19, they introduce a gold third sweater, but wouldn't be heartbroken if the 2016 WC sweaters get re-used.