Perfect World/YMMV


 * Goddamned Boss: For Wizards and Psychics, the aforementioned level 100 enemy Kun Kun is this. While most classes have no problem killing him (meleers have little problems, for obvious reasons; Venomancers can simply sic their pets on him; Clerics can use Plume Shot and fly out of the way of the stronger enemies), Kun Kun is 100% resistant to spells. This means that the unlucky Wizard or Psychic must now physically smack Kun Kun, doing about 3 to 4 damage per hit. And since he runs so much...
 * Crowning Music of Awesome: The Archosaur theme. It's the choir that does it.
 * Some of the music from the Genesis expansion. Gorgeous. Really captures the mood of the area.
 * Uncanny Valley: When customizing your character, try setting "eye openness" to max and eye size to minimum. The eyes look like they will fall out at any second.