I've really enjoyed a *lot* of fanfics, and I've listed those before in "what are your fav fics" questions, but this question is a new one . . . I'm trying to think of ones where the words or theme come back to me again and again--not many books that do that, and those are the ones that really made an impact on me.
I'd have to say Annie M's Playing the Game is the first that comes to mind when I think of fics that really made an impact on me, the words Clark says to Lois about loving her unconditionally. I think of those in friendship terms every now and then. (And one of these days I need to send her some fdk and let her know how much I enjoy reading that series.)
