This isn't a meme...at least not yet, but you can make it one if you want to. (every meme has to start somewhere, right?)
Have any passages from books or movies influenced you so strongly that you feel the influence shows in more than one of your stories?
(The time I tried this, I just presented it as if I'd seen it somewhere else. I did see at least one flister respond to it. No, I'm not telling you which it was.)
Not so much a single passage, but The Once and Future King has given my fanfiction a propensity for happy, amicable threesomes (Riker, Troi and Worf; Archer, T'Pol and Trip; Spock, Uhura and Kirk; but never Buffy, Angel and Spike).