Best class in WoW (for leveling up?)?

9 times out of 10 someone will say Hunter is the best leveling class. I think a Subtely Rogue is best. The reason I like Sub rogues is because you can pretty much 1 hit anything in your level range with Ambush. Race wise, it doesn't really matter. The race bonusses are generally so small that the difference between a Troll, a Blood Elf, and an Orc are minimal. I'd suggest play around with hair, skin, and race styles and choose what you think looks best. Good luck leveling. :)