Breakfast Topic: What Do You Want from the Expansion?

This question posed on the general forums, while I presume it to be in jest, got me to thinking. The poster wants a blue dragon whelpling as a non-combat pet and claims, succinctly, that if one is not provided in the expansion, he will not be purchasing it. However, what are the real make-or-break features of the expansion? The features the game must have, and without which you wouldn't think to purchase it? I'm quite sure I'm already hooked – the revised PvP system and the smaller dungeon caps have already sold me on it. But I'm sure there are others who disagree. So what do you feel the expansion must have to keep you interested and involved in the game?