advice: See the new world by doing a alt or a new character to lvl 85.
do not take your 80s and learn flying, and just fly around - its amazing flying around but you need to discover, and see and complete the content from the ground, or it wont have the same impact. Orgrimmar and Stormwind are nice from the ground but sick from the air. but dont cheat yourself from going all the way from 1 to 85 in this new world. if you do, it's the equivelent of skipping the entire lord of the rings trilogy and only watch the 10 last minutes. they might be good(or whatever) but they wont mean shit compared to if, you had seen the 3 films in their entirety.
yeah, it might be hard not to do, but exploring from the air, is not the way to start. trust me on this. wait with that shit.