what class for my charr?
I’m sure you won’t have that problem with the charr as a whole, though the heavier the armour, the less likely the armour will have that hour-glass look.
Have a look at a site like http://argos-soft.net/GW2ArmorGallery/ — or just make a throwaway charr of any profession, play through the intro, and then pop into the Heart of the Mists and go nuts previewing outfits at the PvP locker.
My own opinion is that, given the fact that most light armors were so obviously designed for human characters, they tend to look weird on other characters, especially charr and sylvari. At least female charr don’t have to deal with the gendered skimpy armor BS, but it still looks … odd. Of the cultural armors, I like light T1, medium T2 and T3, and heavy T2 and T3 except for the overdose of spikes on some parts. Watch out for the ridiculous levitating pauldrons on medium T2 and T3 and heavy T1 and T2, though. It’s painfully obvious and badly designed.
Overall, I think heavy works best with the charr.