That’s the interesting thing for rogues, you can use pretty much any race. I play a belf male for the silence so I can really frustrate casters, plus they’re my preferred race. I only play the horde side so I can’t speak to alliance players, however for horde I’d have to assume that goblins would be a preferred race, simply because they’re small and could easily hide without using stealth or anything. Due to the racials I could see trolls and orcs being useful races for it. Orcs for the attack power boost and fist/axe damage boost, trolls for the attack speed boost. Rogues are pretty much all preference though.
I prefer undead, the racials are pretty neat you have touch of the grave. Also i find cannibalize pretty useful if running low on health in arenas. Also got the Will of forsaken but kinda shares cd with trink.