Because I had nothing better to do, I browsed the K/S archive last night and chances upon some fascinating material. There are a lot of "first times" in here; I like reading them because they're all so predictable. Bad writing is bad.

"A Game of Chess": [link] Rated for adults; I was a bad girl and read it anyway because WHO'S GONNA STOP ME? Anyway, I can totally understand why it was rated adult; there's explicit sex and some Vulcan genitals: there are tendrils. Takes place right after "Amok Time".

"A Means to an End": [link] This is the kind of thing some people find lulzy but I think is kind of stupid. Anyway, Spock has a hangover.

"And In the Darkness Bind You": [link] Rated for adults; again, I didn't give a shit and read anyway. This is almost exactly the same as the Amok Time one except it takes place after "Operation--Annhilate!" and is angstier. And longer. And generally better, I guess. There is explicit sex and some incredibly amusing euphemisms that would have perplexed me two years ago. No tendrils, sadly. Why the fuck am I reading this crap.

"Forward Retrospection": [link] Spock Prime is aboard the STXI Enterprise for some shit reason and he's going nuts. He hears his Jim talking to him. There's hints of pon farr. It's kind of short and sad.

"The Great Beyond": [link] HOLY FUCK this one is sad. If you're one of those people that cries easily, you're liable to start bawling a few paragraphs in. If you know me at all, understand just how devastatingly sad it was when I tell you that I was crying when I got to the end of it. But it's beautiful. Written before STXI came out (and therefore no longer canon), it's about Kirk's death in Generations. It's so sad. Oh my god.

Edit: And another one that I read about a month ago and loved:
"The Ending That Has Not Yet Been Written Part I-IV": [link] It's a four-part series about nuTrek K/S after the five year mission. The first part has a kissing scene, the second part has nuSpock undergoing Kolinahr, the third part is the best and has SpockPrime's death scene (OMG SO SAD AND BEAUTIFUL), and the fourth part is ridiculously hot K/S sex. I linked to the first part because, well... it's the first part, but the third and fourth ones are really the ones worth reading.