After you kill the Enderdragon, you are treated to a conversation between two strange beings, who appear to be the true architects and creators of Minecraft. What they say, and what they say to you, is strangely heartwarming.
and the universe said I love you because you are love
With the new breeding feature, which let's you breed 2 animals to create a baby animal, it's heartwarming to see the adults surround the baby.
And some mods add more animals, and therefore more cute babies (and pets)!
The Iron Golems handing roses to Villager children is quite touching.
Snow Golems. They have little health and no attack, and yet they will throw snowballs at monsters just to protect you.
Wolves love you more than their own pack and their own lives after you tame them, they even let you injure them.
Playing in creative mode, and spawning hostile mobs that don't attack you (unless you attack them). You can walk (or fly) up to them and they'll be utterly passive towards you. Now it's possible to have pet creepers and more!
Never Let You Go, which is a sequel to the famous Tear JerkerNever Say Goodbye. If you haven't seen the first video, it details the story of Steve and his lover, who are attacked by zombies. Steve fails to save his girl from being captured by the zombies. When he sees her again later, he is horrified to learn that she has been turned into a zombie. It was strongly implied that he was forced to shoot her, and when he returns home, it is also hinted that he is turning into a zombie himself. However, the sequel changes all of that by revealing that he never really shot her and that him turning into a zombie was merely a bad dream. Steve vows to restore his lover back to normal by brewing a potion that reverses the zombification process. After making it, he searches the entire world, looking for her. He fights off the zombies single-handedly and restores her to normal. The couple finally receive their happy ending, after a lot of emotional turmoil.