Romances! Hetero! Yuri! Yaoi!

[NYCarrieW]

Watashi ni xx Shinasai! (hetero; highly recommended)
Gakuen Alice (hetero)
kaichou wa maid-sama (hetero; super slow update but highly recommended)
Skip Beat (hetero)
Faster than a Kiss (Hetero)
Love so Life (Hetero)
Ao Haru Ride (Hetero)
reimei no arcana (Hetero)
LAST GAME (hetero)
akagami no shirayukihime (hetero)
dengeki daisy (hetero; HIGHLY HIGHLY RECOMMENDED)
seiyuu ka (hetero)
Special A (hetero; same artist as seiyuu ka)

Hope you find this list helpful

[Magicflier]

I didn't see these animes mentioned so i'd thought i'd continue the list:
(Hetero!)
(Yuri!)

MUST WATCH:
Kami nomi zo Shiru Sekai (The World God Only Knows)
Acchi Kocchi
Bungaku Shoujo
Da Capo
Hiyokoi
Itazura na Kiss
Kashimashi: Girl Meets Girl (Yuri)
Mai-HiME (Hetero/Yuri)
Saikano
True Tears

The rest:
Dragon Crisis!
Akane-iro ni Somaru Saka
Aoi Hana (Yuri)
5 Centimeters per Second
Astarotte no Omocha!
To Heart 2
Myself ; Yourself
White Album
Futakoi
Hotarubi no Mori e
I''s Pure
IS: Infinite Stratos
Itsuka Tenma no Kuro Usagi
Kobato.
Lovely Complex
Mayo Chiki!
Nanatsuiro Drops
Rec
Sankarea
Toki wo Kakeru Shoujo (The Girl Who Leapt Through Time)
Sekirei
Yosuga no Sora
Tetsuwan Birdy Decode
Sora no Manimani

(not the focus, but is aimed at)
Chihayafuru
Busou Renkin
Saki
Baka to Test to Shoukanjuu
Sora no Otoshimono
Eiyuu Densetsu: Sora no Kiseki
Denpa teki na Kanojo
Gosick
Hanasaku Iroha
Mirai Nikki
Pandora Hearts
Shakugan no Shana
Steins;Gate
Yumekui Merry
Zero no Tsukaima
11eyes

Manga:?
Mahou Sensei Negima!
Kami nomi zo Shiru Sekai
Shinobi Life
Kimi ni Todoke
Akuma to Love Song
Strobe Edge
Moe Kare!!
Magico

[Magicflier]

I've forgotten to mention one more..

The rest:
Ikoku Meiro no Croisée

[dacXlee]

Nana
Love me Knight
Marmelade Boy
Kimagure Orange Road (maybe my all time favourite romance anime)
Kodomo No Omocha
Maison Ikkoku
Ranma
Escaflowne

Eeeeeh, can't think of any homosexual examples... Just comics....