I have two toons at 103 (shaman and druid). Both of which just got all of their artifacts and did the Light's Heart quest. I'm putzing around to get to max level just because I know the only thing left to do besides raid/dungeons are world quests which interest me like a hole in the head.
The faster you get to the end, the faster you'll get burned out. It's a marathon, not a sprint. That's why I laugh at those who want to get world firsts. So? What are you going to do after that? You just have more time to repeat the same things over and over. I'd rather take my time and do something fewer times.