Good criticism on the internet is hard to find, especially when people mistake being snarky for actually having good points. Also, it's nice to have a counterpoint to myself, as I probably come off a bit easy on the show.
I have it saved on another PC, but it was a simple enumeration of the differences of the Rin'negan and base Sharingan. It really helped give a broad perspective on the two when the fanwars were prevalent, and later on many referenced it.
Hell, you may even be able to google it-Rin'negan vs sharingan or something like that.