While I know BC was not without its faults I feel that BC was the most epic and immersive xpac from WoW and IMO any other MMO. The scope was massive, the instances and raids were challenging and the zones were so atmospheric and moody, even today when I go through shadowmoon I get chills from the music and atmosphere. The raids felt so epic especially Black Temple and of course the armor sets and gear were among the best looking. I don't know whats planned for the next Xpac since some rumors say its the last others say they got 3 more. I'm hoping for another Burning Legion storyline since we still have KJ alive and of course Saragas they can defiantly revisit the burning legion again and I hope it can achieve the quality and feel of BC.