Hands down the hardest watch buying decision I ever had to make, I feel your pain.
I ended up buying a black for the following 2 reasons...
1) EVERY picture I have seen of the black on people’s wrists looks amazing while I can’t say the same about the blue.
2) I want to wear it on the rubber strap at some point and I find the blue strap + the blue face, well, too blue. The black looks killer on the black rubber strap.
That being said, everyone’s points in this thread are valid. The are many time when I regret not getting the blue, mostly because I have other black dialed watches and no blue watches. I’m sure I would have the same regrets about not buying the black one if I bought the blue one.
Good luck with your decision, either way, you can’t go wrong. It’s an amazing watch.