I first ran across Ironychan in the Pirates of the Caribbean fandom. Brilliant long fics that did not always survive to the finish line that I still recall vividly years later.
This one made it to the end. Holy crap. The plot twists. The visceral detail. The deep philosophical questions. The gut punches. The featherlight touch.
OMG read it. It's gen, PG-13, 120 thousand words, complete, hot off the author's home computer.
In it, JARVIS becomes a human, with all the misery and joy and uncertainty that that entails. (SPN people, read it for the parallels between Tony and JARVIS and Dean and Castiel.)
Read it!