Anime/Manga:

DBZ: Gohan/Vedal, Pan/Bra
SaliorMoon: Makoto/Ami, Rei/Minako, Hotaru/Chibi-Usa, Haruka/Michiru, Setsuna/OC, Setsuna/Ami
Inuyasha: Sessoumaru/Kagome, Sango/Miroku
Spirited Away: Kohaku/Chihiro
Bleach: Unohana/Isane
Mai Hime/Mai Otome: Mai/Mikoto, Arika/Mashiro, Shizuru/Natsuki, Chie/Aoi, Haruka/Yukino

Cartoon:
Gargoyles: Demona/OC, Eliza/OC, Eliza/Goliath, Demona/Fox/OC (As seen in Princess Alexandria's Trinity Saga)
Teen Titans: Starfire/Raven
Kim Possible: Kim/Shego
Daria: Daria/Jane
Avatar The Last Airbender: Aang/Toph, Toph/Katara, Katara/Zuko, Azula/Ty Lee, Sokka/Suki

Videogame:
Pokemon: Ash/Misty, Jessy/James, Jessy/Misty
FF8: Quistis/Fujin
KOTOR: LSF Revan/Bastila, LSF Exile/Atris
Jade Empire: Wu/Silk Fox
Red Faction: Alec Mason/Sam
Kingdom Hearts: Kari/Namena

Movie:
X-Men: Jean/Rogue, Jean/Storm, Jean/OC, Emma/OC, Sage/OC
Loveing Annabelle: Annabelle/Semon
D.E.B.S: Lucy/Ami
Imagine You and Me: Lucy/Rachel

TV:
StarTrek Voyager: Kathryn/Seven, Seven/B'Elanna
StarTrek Enterprise: T'pol/Hoshi
StarTrek Deep Space 9: Kira/Dax
StarGate SG1: Sam/Jenet
StarGate Atlantis: Sam/Elizabeth, Elizabeth/Teyla
Chuck: Chuck/Sarah, Chuck/Jill

Recommendations: Below is a list of Stories and Authors that I myself love, and have admittedly read more then once because they are just that good. As a avid reader, and a picky one at that, I know it is hard to find a good, well written work of fiction, rather original, or fan-made. So here I take some of the guess work out of looking.

Author: Kudara
Link: http://www.fanfiction.net/u/556176/Kudara
Favorite Stories by Author: After a Millennium A Renewal - Puppet Strings and After a Millennium A Renewal - Discussions (Demona/OC)
Personal Comments: Kudara is an amazing writer, and her on going series "After a Millennium A Renewal" is amazing. She takes a hard to write character, and portrays her (Demona) beautifully and believably. The series starts with Puppet Strings and flows seamlessly into Discussions. Every character, from cannon to original has such depth to them. And the romance between Kudara's OC Kendra, and Demona is wonderfully writen, leaving often on the edge of your seat wanting more.

Author: Princess Alexandria
Link: http://www.fanfiction.net/u/182776/Princess_Alexandria
Favorite Stories by Author: Rebuilding(Jean/OC), Not Myself(Emma/OC), 500 Miles(Squeal to Not Myself -Emma/OC), Summer Daze (Jean/OC - Sage/OC), Trinity Saga(Demona/OC/Fox - Eliza/OC), Lone Clone(Demona/OC), 21 Things I Want In A Lover(Storm/OC), Family Shame (Demona/OC), and Alone(No Pairing)
Personal Comments: I do not know where to begin. Princess Alexandria is perhaps one of the greatest author who's works I have read outside of those who have been published. In some cases she is even better. I can not just choose one of her stories to recommend! The first story I read by this amazing author was Alone, a none romantic story that centers around Demona and a OC human girl who comes into Demona's care. Then it was the Trinity Saga, which remains uncompleted and I highly recommend that those who are of legal age venture to Princess Alexandria's site for the longer version. Not Myself, and it's sequel 500 Miles, are both complete, and held me in rapture and on the very edge of my seat from start to finish. I have to say, there are parts within 500 Miles that are dark and twisted and as a reader I both love those parts, and hate them. Princess Alexandria's writings shed light on the darkest, most undesirable parts of beloved characters. And she is the reason why I hate both the Professor, and why my disdain for Scott grew ten fold. On the other side of the spectrum, Summer Daze is another beautifully written story, though she has not updated in so long its heartbreaking. But there are parts in that story that make me laugh, and there is also a quote, by the OC that the story centers around that is by far, my most favorite line in any work on fanfiction, and in the top five for quotes from both published and none published works. Right next to a quote from Dune.

Author: Chendzeea Li
Link: http://www.fanfiction.net/u/93516/Chendzeea_Li
Favorite Stories by Author: Frozen (Quistis/Fujin)
Personal Comments: Frozen is 100 chapters of reasons why I love Quistis and Fujin together. This story made me fall in love not only with this pairing, but with both Quistis and Fujin as characters. It is a long story filled with a deep story line that grabs and holds you, keeping you glued, from word to word, chapter to chapter. I do no recommend reading this in one go, else you will find that the sun has come up, and your only on chapter 98. It is a story I have read a dozen times through since I have found it, and have gone back to my favorite parts a dozen more times just to enjoy some Quistis/Fujin goodness.

Author: Nutzoide
Link: http://www.fanfiction.net/u/334082/Nutzoide
Favorite Stories by Author: After The Vault (OC/OC)
Personal Comments: After The Vault is a Fallout story that, if I am not mistaken, takes place around the same time frame as Fallout 2. It features a whole cast of well written original characters and truly sticks to the feel of the name Fallout. This is a work of femslash, though there are upfront heterosexual relationships between members of the main cast. There is also reference to drugs, sex, graphic violence... It is a Fallout story after all.