The Snake and the Fox (джен)

Because we all know Orochimaru was the Third Hokage's favorite student, there is no way, had he stayed, he wouldn't eventually meet Uzumaki Naruto. And we all know how Naruto has the ability to charm and entice everything alive towards him. Even the most sour of the Sannin, who is a breath away from a mental breakdown.
 
Or, the one where two lonely orphans meet, make a family, give the Hokage lots of headaches and the world is so much brighter for it.