The Burning Crusade...
http://www.worldofwarcraft.com/burningcrusade/
An increase in the level cap to 70
Two new playable races, including the magical Blood Elves
New starting zones in Quel'Thalas and beyond
The entire new continent of Outland, reachable through the
Dark Portal
Many new high-level dungeons to explore in Azeroth,
Outland, and elsewhere
New flying mounts in Outland
Many new and dangerous monsters, including epic world
bosses
Hundreds of new quests
Hundreds of new items
A new profession: Jewelcrafting
Socketed items
And much, much more...
...I'm there.
An increase in the level cap to 70
Two new playable races, including the magical Blood Elves
New starting zones in Quel'Thalas and beyond
The entire new continent of Outland, reachable through the
Dark Portal
Many new high-level dungeons to explore in Azeroth,
Outland, and elsewhere
New flying mounts in Outland
Many new and dangerous monsters, including epic world
bosses
Hundreds of new quests
Hundreds of new items
A new profession: Jewelcrafting
Socketed items
And much, much more...
...I'm there.