The thing is, what looks good is subjective and will very person to person. I actually like the "flat" look on the right vehicle when done well. It has a very military-ish look and that can be cool. But there is fine line between it looking like crap and it looking good. And from my personal experience, with cheap paint, it will look good at first, but it will be hard to maintain and it will fade and chip fast. I also think, that flat black is the worst color because any imperfections are going to be very noticeable right away. With lighter colors, like the khacki color I did on my first Trooper, imperfections will hide easier.
So, for instance, to me, these examples look absolutely ghetto and horrid:
Now here's a quick example of what I would call "matte" black. Like I said above, more of any eggshell finish than a truly flat finish. This, on the right vehicle and when done well, can look pretty cool:
So it really just comes down to your personal preference.
Another thing to consider is heat. I don't know what color your Trooper is now, but if it is a lighter color, you will soon find that is hellish to be inside once it is black. My VX is black and when it's hot outside, it's pretty miserable to be in.
HTH,
Bart