To each their own on Space gray. Apple never could pin point what they considered 'Space Gray', through various products and color saturation.
However, Space gray was a staple color for Apple as long as I can remember and was a strong selling color, especially if one wanted something subtle, yet professional. The last thing I wanted was some iPhoneC color, carrying around in a business suit.
Space gray was low key and sleek, without having to be flamboyant and show everyone 'Look at my new iPhone color.'
Boring, is your opinion, to others, it was exactly what we wanted, professional and sleek.