Personally, I like the Jet Black better. But, I also don't think any of the Matte black cars that are around my area look good either.
I feel some people here are posting to help justify their choice. I think there are people who wanted JB but when the wait time went to October and even November, they decided to order the Matte because it was available now. I may have done the same if I had to wait that long too. Now, some of those people are just trying to convince themselves that the matte is the phone they want to avoid the buyers remorse for not being willing to wait for what they had first wanted.
Of course not everyone fits that, I know people who wanted MB right from seeing the keynote, so to each their own. They are all the same on the inside, only difference is the color on the outside.