I just picked up the black Verizon version of the G3 yesterday. I have been doing the Verizon Edge plan so I was able to upgrade early. It was a hard decision because I currently had a Motorola Droid Maxx so I knew I'd be taking a hit on battery life, but I also really wanted to try something new after being with Moto since the original Droid came out in 2009.
I think the Verizon black looks good. The back is actually more of a dark gray then black and it has a brushed metal look to it. It looks much nicer in person then it does in pictures. I was disappointed that they had to put a Verizon logo on the front of the phone, but it is small and doesn't totally mess up the design. I'm sure Verizon was worried if it was only on the back cover someone would change the cover and then there would be no logo! Man that company loves itself...
With that said, I haven't had enough time with it to really give a review, but it is a nice looking, light phone with a beautiful 5.5" display on it. It's not a whole lot larger then my 5" Droid Maxx, but it is a little thinner and lighter. It's a plastic phone, but it feels pretty solid. It's not built like the tank like Maxx, but I'm happy with it.
Anyhow I'll give more of a review after a few days. I'm sure enjoying the larger screen so far and the Optimus UI seems to be a big improvement from what LG has had in the past. Think of this skin as somewhere between Touchwiz and stock Android. The Droid Maxx is almost stock Android so I'm still in the learning phase, but I'm excited to see and try some new things.