My couple obsessions:

Anime/Manga: Fruits Basket Kyo x Tohru (Kyoru) and Ayame x Miine, Yuki x Machi
Chobits Hideki x Chii and Shinbo x Yumi (gah hah! I know I'm weird!)
Kodocha (both anime and manga) Akito x Sana (of course! They are meant to be!)
Marmalade Boy Ginta x Miki and Satoshi x Meiko (kills Namura stay away she's Satoshi's!)
Full Moon wo Sagashite Takuto x Mitsuki, Izumi x Meroko (hey! they kissed and I thought they were cute!)and Wakaouji-sensei x Ooshige-san (sooo kyoot!)
Ayashi no Ceres Yuuhi x Aya
Naruto Sasuke x Sakura, Naruto x Hinata, Kiba x Hinata, or Gaara x Hinata, Shikamaru x Ino (notice the other girls' choices of two men except for Ino! LOL), Neji x Ten Ten or Lee x Ten Ten
Full Metal Alchemist Edward Elric x Winry Rockbell and Roy Mustang x Liza Hawkeye (sorry I DISLIKE Yaoi, therefore, I dislike Roy and Edward together...blech!)
Orphen Orphen x Cleo (duh!)or maybe even Hartia x Cleo
Rurouni Kenshin Kenshin x Kaoru
Black Cat Jenos x Rinslet or Train x Rinslet
Bleach Urahara x Yoruichi, Ichigo x Rukia, Renji x Rukia, Kira x Momo, Momo x Toushiro, Shinsui x Nanao, Ishida x Orihime and Gin x Matsumoto
Ranma 1/2 Ranma x Akane
Cowboy Bebop Spike x Faye
Sailor Moon Mamoru x Usagi (Darien x Serena)
Vampire Princess Miyu Larva x Miyu
Get Backers Ginji x Natsumi, Ban x Himiko or Ban x Natsumi and Shido x Madoka (It's obvious! They get together! HOW CUTE!) and hey maybe even a Makube X x Ren could work!
Spiral Ayumu x Hiyono! (ADORABLE TO THE CORE!)
Digimon Yamato x Mimi, Tai x Sora or Tai x Mimi, Takeru x Hikari
Nanaka 6/17 Nanaka x Nenji (of course! They love each other!)
Trigun Vash x Meryl
Dear Boys Moritaka Mai (pony-chan ) x Aikawa Kazuhiko
CardCaptor Sakura Eriol Hiragizawa x Tomoyo Daidouji
Witch Hunter Robin Robin x Michael
Pita Ten Takashi (Ten-chan) x Koboshi
Samurai Champloo Mugen x Fuu or Jin x Fuu
Hot Gimmick Ryoki x Hatsumi, Shinogu x Asahi and Subaru
Last Exile Claus x Lavie, Alex x Sophia or Vincent x Sophia, Mullin x Dunya, Ethan x Alister, and yes even Dio x Alvis (XD)
Tengen Toppa Gurren Lagann Kamina x Yoko, Simon x Nia, Rossiu x Kinon, Kittan x Yoko
Samurai 7 Kirara x Katsushiro
Zombie Loan Chika x Michiru

Final Fantasy/Other games:

Final Fantasy VI Edgar Figaro x Terra Branford I don't mind a little Locke x Terra either!
Gau x Relm (I think they are cute together!)
Final Fantasy VII Cloud x Aeris, Sephiroth x Aeris and Reno x Yuffie
Final Fantasy VIII Seifer x Quistis, Squall x Selphie, Zell x Selphie and Irvine x Fujin (hah hah! I don't really care much about Irvine, but I think he and Fujin should REALLY hook up!)You know I also don't mind a little Irvine x Rinoa or Zell x Rinoa
Final Fantasy IX Vivi x Eiko (cute cute!) and Kuja x Beatrix (I know what you're think...WHAT? HAH! HAH! But I'm sure it'll work given the circumstances...o.O)
Final Fantasy X/X-2 Tidus x Yuna, Tidus x Rikku, Auron x Lulu, Gippal x Rikku, Baralai x Yuna, Baralai x Paine
Tekken 2/3/4 Jun x Kazuya (they have a kid of course!), Paul x Nina (interesting eh? ;)), Jin x Ling or Hwoarang x Ling or Hwoarang x Julia and Steve x Julia
Zelda Link x Zelda (what more can you ask for? They are 'destined' to be together!)
Kingdom Hearts Cloud x Aerith and Leon x Aerith, Sora x Kairi, Riku x Yuffie

Final Fantasy Crossover couples:

Cloud x Quistis, Squall x Rikku, Zidane x Rikku, Vincent x Quistis, Aerith x Squall (Leon), Tidus x Selphie and Laguna x Aerith

Others(television and books):

Harry Potter Harry x Hermione
Angel Angel x Cordelia, Wesley x Fred
Buffy The Vampire Slayer Spike x Buffy
Friends Chandler x Monica (duh!), Ross x Rachel

Well that's all my LONG list of fave couples! All I have to say is that I luv Final Fantasy and love to write about them, especially Final Fantasy VIII! I have become soo obsessed with Seifer x Quistis that I don't seem to stop with my ideas! I have more ideas coming for these two couples as well as Zell x Selphie! I was thinking of trying out Squall x Selphie as well!

Hey! Well I want to add THIS as well. These are JUST story ideas for Naruto of my favourite couplings, but I am not sure if it will happen so we'll see:D

Naruto:

Gaara/Hinata – The Last Ray Of Light (COMPLETE) Summary: Four years have passed since the disaster in Konoha occurred and now a threat is being formed in the Hyuuga family household. Gaara is hired to get rid of the Hyuuga family, but for what purpose? Only he doesn’t seem to know and a chance meeting with the main member of the Hyuuga clan changes his life forever. (PG-13 Drama/Romance) note: They are sixteen here

Sasuke/Sakura – The Flower That Blooms In Spring (COMPLETE) Summary: A past deep within Sakura, comes climbing back to her life which may alter the lives of herself and Sasuke... (PG-13 rating may change to R Drama/Romance) note: They are twenty-one on this one for obvious reasons

Shikamaru/Ino – It Takes Two (COMPLETE) Summary: It's Shikamaru's birthday and he's not quite happy...so Ino decides to show Shikamaru what it means to be young again, even IF they're only fifteen. But Shikamaru and Ino never expected such a good 'turn out' ...mostly from Shikamaru's POV One shot (PG Comedy/Romance) note: they are fifteen

Pita Ten:

Takashi/Koboshi - Kotarou-kun (COMPLETE) Summary: 6 years have passed and Koboshi is in Japan for the summer, only to find that Kotarou is with someone she never expected him to be with! Meanwhile, Ten-chan is still trying to figure out his growing feelings for the grown up Koboshi Uematsu. (K- Romance/Drama)

Takashi/Koboshi, Kotarou/Misha, Nya/Shia - Ayanokouji-sama(In progress) Summary: Someone returns to Japan from Takashi and Koboshi's past, but not to rekindle friendship, but to reclaim what 'belonged' to her. The title says it all! ;) Continuation from Kotarou-kun. (PG - for some violence, but barely...Drama/Romance)

Final Fantasy 6:

Edgar/Terra - Cielo e Terra (Heaven and Earth) (COMPLETE) Summary: A romantic one shot story of Edgar and Terra. 5 years have passed since the defeat of Kefka. Through an exchange of letters between the half-Esper and the King of Figaro, feelings begin to develop and a revelation that would change their lives forever.

Fullmetal Alchemist:

Roy/Riza - The King'sQueenSummary: What risks would you take for the sake of loyalty? How far would you go to prove yourself? When Riza takes on a mission in the underdeveloped slums of Eastern Amestris, it's the most challenging she has ever faced, putting her life on the line and testing her loyalty to her Brigadier General, Roy Mustang.