:3 I believe this is my first ever completely-read Snape/Filch. (I shudder to think how many snilch fics I bookmarked to read, and then left out in favor of snarry.^^)
Snape/Filch is another LOL pairing like Slockhart, except Snilch is an out-of-necessity pairing, whereas Slockhart is a everything-snape-fears-about-harry-potter's-fame-is-absolutely-true-for-lockhart kind of thing. (and he still couldn't tell the difference between Harry and Lockhart in CoS!^^)
I love hp!poem!fic! This makes three authors off the top of my head who write poetry (my one poem aside^^): mctabby, bethbethbeth, the author of Severus the Shakesperian Slytherin, and YOU! :3