Honestly, I like it because it looks pretty badass.....well, not so much the helmet, the helmet is kinda weird looking, but the chest and shoulder pieces are pretty damn awesome.
ive accomplished almost everything i wanted to accomplish in my halo 3 career: i have gotten 1k achievements, forged over 25 maps (that are good), got my brigadier and highskill 45 ( i h8 general, it looks weird) but the only 3 things i look forward to are 4500exp, at least 2 featured maps, and recon because it just plain looks sweet as hell
I don't think the helmet is too cool either (looks like rouge with two scopes of icecream missing), I think by now the badass shoulders and body are as renowned as the helmet.