So I've been playing Wow for a very long time, I started at the end of Vanilla and got my first raiding experience within the Burning Crusade. I always heard the stories of Vanilla and how it was epic but many say Burning Crusade was the best expansion there ever was. Now I can't judge for Vanilla but out of BC WOTLK and Cata, I'm inclined to agree.
Recently a video come to my attention, the man makes a very good point. So I'll shut up here and let him do the talking. I must say I agreed with every single thing he said.
On another note, the Insane In the Membrane guide is up to date and can be found here. I hope its helpful.