Maybe it's just me being odd, but I adore the kisses in fandom. They're how I remember a fic. I won't remember the sex scenes (with a few exceptions) or the title or how I found it but I always remember the first kiss.

What makes or breaks a kiss? *ponders* I think it spoils the tender moment when a worm is involved. Or when one of the following lines is, 'You make me puke.'
I'm not quite sure how quite I'd put into words how heart-achingly beautiful some of the Cinnamon kisses are. There's this fragility to them, which is stunning to read. The bittersweet kisses are what I live for.

And as for the hottest kiss. . . I'd have to nominate the Love Under Will Chapter Five kiss. I still remember the first time I read it...