well in light of dalamars thread, im making the total opposite
what wow instance did you absolutely hate, and wished was just not added to the game.
my answer is simple, and obvious...
uldaman! (or w/e the instance is in bad lands...i think thats what it was...been so long)
the last boss is incredibly difficult and its way to f'ing long, and the staff pieces for the bonus boss, its just 1 big shit sandwich, and im sad that i took a bite -.-