Best yaoi

I don't have a favorite, but those two (among others) definitely fit your description:
http://www.mangago.me/read-manga/puchitto_hajiketa/
http://www.mangago.me/read-manga/doukyuusei_nakamura_asumiko/

Katekyo, Rutta to kodama, honto yajuu ε=ε=(ノ≧∇≦)ノ

For me Ameiro Paradox: http://www.mangago.me/read-manga/ameiro_paradox/ It hasn't been updated in a while tho but luckily its more slice of life so it doesn't leave you hanging with too big a cliffhanger.

Genwaku no Kodou

escape journey, it's just so realistic and i love how everything seems to centre around the theme of 'family'. ofc anything by ogeretsu is worth re re re re reading haha

This because it is so joyously sexy:

http://www.mangago.me/read-manga/yondaime_ooyamato_tatsuyuki/

And this because it's a feels ride that provides absolutely perfect closure:

http://www.mangago.me/read-manga/senya_ichiya_shitone_no_himegoto/

ok lets start with the ovius once:
Junjou Romantica and Sekaiichi Hatsukoi
next is Royal Fiancé
and the last and my most favorite one is
LOVERS DOLL!!!
the last one is my most favorite story of this entire world!(๑•ㅂ•)و✧(๑•ㅂ•)و✧

http://www.mangago.me/read-manga/sotsugyousei/

Masterpiece. (⌒▽⌒)

Aitsu no Daihonmei!! I could re-read it 100k times and I would never get tired of it ε=ε=(ノ≧∇≦)ノ

Hidamari Ga kikoeru, Konya mo Nemurenai and 500-nen No Itonami ლ(´ڡ`ლ)

Saezuru tori wa habatakanai
hana to usagi
sayonara, itoshi no my friend
puchitto hajiketa

Sakura Gari

Oh gosh. . . .there's so many. . .

- Katekyo!
- ZE
- Doukyuusei
- Yondaime Ooyamato Tatsuyuki (although it's recent I've read it alot)
- Hontou Yajuu
- Ai To Yokubou Wa Gakuen De
- Konya mo Nemurenai
- Hidoku Shinaide

etc, etc, etc.

(づ￣ ³￣)づ ★★★★★

Under Grand Hotel & In These Words are my all time faves.~ <33