Okay, here's the final product. I was close before, but the nose needed a lettle more thickness and the roof needed to come down a couple notches. other than that, it was just a matter of fine-tuning. NOTE: I am going for a "stock" humvee here, not a military-adapted model, and CERTAINLY not an H2 or H3.
Good work! I'm not a Hummer fan at all (in fact I hate them outside of the military) but this is a nice representation. One thing that, to me, looks a bit out is the front overhang (should be one stud shorter?) but still a very good creation.
It looks pretty good so far! To improve the shape of the body, maybe you should make the front end a little thicker... it just needs more of those green plates around the hood area. The rest of the body looks spot-on, and the details you've included so far are lookin' nice. DON'T SCRAP IT! Keep going!