I've realized, for the most part, I use quotes from TV shows, the movies, and comics to communicate. A lot of what I say refers to cinema, Mad magazine satire, and scenes from shows like Seinfeld, Friends, and Yes - Prime Minister among others.
Think it's true for many others. Everyday, I find myself using material from here to illustrate a point, or to narrate anything.
Or - people around me will attest to this - I often repeat some irrelevant lines for no reason.
'New Fazoola!' - (MAD's take on a Mazola oil ad. Been doing this one for many years now, when I see any new product ad )