The awesome little kids living in the apartment across the hall from my sister and I... just moved out yesterday.
I say awesome, and I mean awesome. Those two (a brother and sister) were always coming over to hang out, talk Pokemon, quote Freakazoid, and engage in Doctor Who-themed shenanigans. We played superheroes and secret agents and vikings and robots (they were the ones that came up with Robot Parade [link] ). We read Choose-Your-Own-Adventure books together. We introduced them to Portal (hear them make an adorable mess of a Blue Sky podfic audition! [link] ). They nick-named our cat Petra "Pe-TREE-a" for no apparent reason. They provided us with an endless supply of unprovoked randomness (Little girl: "Believe this. Your dress is alive, and it says: 'You are SO grounded.'").
We. Are. Going. To. MISS THEM.