I played from launch up until just after BC came out and returned shortly just before CATA was released and left shortly after never to return.
The game I loved is long dead, the soul was sucked out of it. You once knew all the people on your realm and could make 'friends' and contacts. Once they introduced the cross realm instancing it all stopped.
The 40 mans were great fun and it was a sad day when they announced they were being removed from game. There were just things here and there that they streamlined the game for but it just well... didn't feel right.
Purples used to mean 'epic' then part way through BC and most of WotLK it became the new green.
Sorry Blizzard, you won't get me back.