For me it was Andale. Im out in the wasteland exploring and i come up to this little town and do the quest called our little secret. I dont want to talk about much just incase anyone hasnt done that quest, itd be a shame to spoil it for them. Just to give a hint its the family with odd eating habits. Anyway thats when i fell in love with the game. Not because of what they did but because what bethesda did. They had the balls to put it in a game and back then and even now not many games do stuff like that in the way they did it.