My eldest daughter and I have both our phones on my account and each get an upgrade every two years in the normal cycle. Last year, I was due to upgrade my 5S but instead gave up my upgrade to her and got her the Rose Gold 6S+ and I took over her regular 6 which was in silver with the white face. I much prefer the black finish to the face but have found the 6 to be such a good phone that it didn't really bother me too much.
In this year's upgrade cycle, neither of us had any real need for an upgrade but heck, you know you're going to succumb anyway, such is the lure and I am so week

Really, I would probably have foregone the upgrade and saved £30 or so on the monthly bill, but the dual lens camera and moving from a non plus 6 just edged me towards making the decision to change. Ok, it's because I am week!
I did fancy going back to a black phone and had already decided that I was going to move to the Plus size. Initially, was drawn to the JB because it did look good in the presentation and (shamefully) it was the "new" and "flagship" colour.
When I visited CPW to order, I changed my mind and ordered the Matte Black Plus 256. I will be honest and admit that, at the time, the reason was that the lead in time for the JB &/or 128 was much longer, and I knew that I would really like either of the black phones.
I would have been satisfied with a 128 JB or MB 7+ but, of course, neither were available on launch day.
Since getting the phone early last week, I am very happy that I chose the MB. It looks great and I am going caseless for the first time so slightly less cleaning ;-)
Of course, it's all personal and it's not a case of "my choice is better than yours". When I see a JB in the wild, I know that it is going to look really nice, as will all of the other colours.
I hope you all enjoy your new phones.