I play a Charr Warrior (Blood Legion) as my main and find that the skill animation and heavy armor look great on them. If you choose warrior, play with no helm (I’m not sure if there’s a hide-helm option, My warrior wears no helm) because I find that the heavy-armor helms look like odd on male Charr.
I’ve seen Charr Necromancers, Engineers and Thieves and I think those professions suit them pretty well. I’ve heard that medium armor looks fairly boring on Charr, but the light armor I’ve seen looks really cool.