In no particular order:
*From the Prince of Persia retrospective (if I'm not mistaken): "A lot of things look good on paper. Like the little blue dolphin patterns on my toilet roll that fail to distract from the issue that I'm wiping my arse with it."
*From the S.T.A.L.K.E.R. review: "Y'know how in most FPSs, you're some kind of hybrid of man and refrigerator who can take an entire 'mmunition's dump to the face, while the enemy all have armor made of whipped cream and skulls made of cake? Well, it seems going into this game, people got their character sheets mixed up."
*From the Haze review: The angel over Yahtzee's shoulder asking him "You want to be a fat bastard or just a regular bastard" whilst our favorite reviewer prepares to bite into a Cornetto(spelling?).
*From the Turok review (my personal favorite of the ones he's done thus far): Ron Perlman looking at his script and exclaiming "The fuck is this?"
*The Mass Effect review opening with Elvis Presley's "A Little Less Conversation".
And the "had tits and was on fire" and "Ohwookizzadoggie" quips that everybody else finds amusing.