Indeed, outside of a single Elf, every Sammy I've ever had in a game was human.
You'd think more Orks would have signed up, but, never in my home games.
Weird. In my games, the guns/melee weapons combat folk get a relatively equal split between humans, elves, and orks; having that boost to the very-vital Agility tends to make for good killer elves, and the old 'if there is no reason why the character should definitely not be an ork, they should be an ork' still kind of applies. If the question is pure unarmed, of course, the trolls get brought out ...
Kinda my experience as well. Due to either high edge, str, or agility and what priorities the player wants.
Dwarfs are not bad, just not as common in some peoples games.