Though he brings up some excellent points in his post, my answer to the question is a resounding yes. I enjoy leveling. Yes, leveling through the same content over and over can be a bore, but the first time or two leveling through new content is a real joy to me. And I know I'm not alone.
Not everyone eschews the journey. Not everyone rushes to the end to get to the "good stuff." Some of us think the good stuff is the leveling -- at least some of it. I enjoy the Silverpine Forest experience every time I go through it. The same with Hillsbrad Foothills. Sholazar Basin and Mt. Hyjal are two other favorites, as is the Valley of the Four Winds. I'm an altoholic and that's partially because of the leveling experience.
For Mists of Pandaria, I think Blizzard provided us with a good leveling experience as well as giving us a huge amount of things to do at max level.With pet battles, they've also added a new way to level, that some (like me) find enjoyable. I think this is a good mix and that Blizzard should follow a similar pattern with the next expansion.
Even if the stories and characters didn't interest me, I would miss the accomplishment of gaining experience and reaching the goals of achieving levels. I like getting new skills and being able to travel to new places, otherwise too difficult for lower levels. I've always enjoyed this in any RPG I've played, MMO or otherwise. I don't want to give it up.
What do you think? Do we need more levels in World of Warcraft's next expansion? Are you looking forward to bringing your character through 5 to 10 more levels? Blog about your answer and link to it in the comments below. Or if you don't have a WoW-related blog, just leave your response in the comments.