When I was selecting my first class, back in the early days of WoW, I chose the rogue for its awesome killing potential. Mindlessly grinding mobs used to be a valid way to level, especially since questing in the past involved so much travel and downtime. Our unique mix of stuns and damage allowed rogues to chew through enemies quickly and efficiently. My strategy was to find an area populated by caster-type mobs and then simply burn through them all day long.
Over the years, rogues have continued to evolve, and we're now one of the strongest leveling classes in the game. Our past weaknesses were our lack of self-healing and our difficulty against elite mobs, but Recuperate and the near total removal of any quest-based elite mobs in Cataclysm has solved both of our problems. Leveling a new rogue today is an enjoyable experience, as we have the finesse to avoid unwanted encounters and the brawn to handle any combat that we do have to engage in.