My warrior is human just because I prefer smaller race. I find dodging and running with either Norn or Charr a bit painful as the animation are slow... bigger race, slower movement and that's fine. I tried a Charr warrior up to level 12 before I switch to my human. So if you want my opinion I prefer the Charr. The personal story was very interesting (Human side is boring). The Norns are just big humans. Yes armor looks cool on them but it does on every race.
What's cool about playing a Charr is it seems to be the less played race. You see human and Norn everywhere. I kind of regret not having leveled my Charr instead but like I said the dodging, etc, animation was killing me.
Try a sylvari rogue (my first one) and start dodging, running, etc and then jump on a Norn or Charr... you'll see what I mean.
My warrior is a norn, but I choose that before game release and not based on armor sets. I have found nice armor so far for every class/race (my Charr is an engineer). Being able to transmute armor is huge so if you find a cool looking armor along the way save it for later (my Ele is going to use lvl 55 winged armor as her final armor as I will transmute her lvl 80 exotics to the winged look).