I refuse to race to 80. I intend to read and enjoy every quest, explore each area, and be sure it's entertaining, and not chore or a second job.
My main is only 1-2 bars into 72 and I'm having fun. I figure it might take me a month to get to 80.
The lore of Northrend is amazing, actually. Much better expansion than TBC was. So much to say, but I don't wanna spoil, let's just say that Chromie is back with a couple really really fun quests and that Arthas isn't the only returning character, as there's something lurking int he Grizzly Hills; that the mechagnomes in Borean Tundra aren't just comedy relief...and more!
The fact that the areas change as you progress on quests is awesome (even if it means you can't help a guy who is behind you quest-wise sometimes) as it gives more immersion to the game.
I only leveled fast because I hate leveling/grinding and wanted to be done with it soon enough. Now I'm gonna relax, go fish, go skin beasties (I refuse to buy stuff to level my LW), fly upon the summits of Storm Peaks, and so on.
Oh, and Alexstrasza is kinda hot.
When you see Spartans shit bricks you'll move on with your life because these jokes are utterly overused.