Recently I bought a new bonded leather TNIV Reference Bible. It's bigger than what I'm used to carrying around, and I'll have to make sure it's used well, before the next revision of the TNIV occurs. I used to steer away from black Bibles, but black was all that's offered, so black it is. Just like my shaven head, black is also something people seem more used to.
I like the cross references, and especially the topical ties at the bottom of the pages. And the single column and black letters (no red letters); I like all of that. But for me the best study of Scripture is to keep reading it, all of it. If anything, I'll have to get used to all the clutter of small letters beside words. My other TNIV's (medium and small sized) which contain the plan for reading through the Bible, will continue to be my main reading Bibles, I think. This may become my main teaching and preaching Bible, and study Bible.
I also like what Billy Graham once said, something like, "The best Bible is the one you use." In other words, we need to be in the word of God, doing so as those who want to hear from God so that we can walk by grace in the way of Jesus.
Would anyone like to share what your main Bible is, including the color, and why you think it's a good edition of it?