Need some Manga help

I've been burned out of reading manga where the protagonists are between the 14-17 age range. I'm sick and tired of the high school setting which seems to be overused way too much. I want to read a decent manga that doesn't necessarily have to be action based or shonen/seinen/ecchi. I just want something enjoyable to read.

Before you guys suggest this is the manga I've read so far:

 Spoiler

- One Piece
- GTO
- Fairy Tail
- Gintama
- Beelzebub
- Ubel Blatt
- Claymore
- Cross Epoch
- Deadman Wonderland
- Highschool of the Dead
- Franken Fran
- Elfen Lied
- Death Note
- AIKI
- Change123
- Detective Conan
- Sora no Otoshimono
- Tenjou Tenge
- History's Strongest Disciple Kenichi
- Kimi no Iru Machi
- D. Gray Man
- Hiatus x Hiatus
- Soul Eater
- Shaman King
- Black Lagoon
- Wolf Guy - Wolfen Crest
- Mysterious Girlfriend X
- Umi no Misaki
- Bartender
- Akumetsu
- Kimikiss
- IO
- Naruto
- Bleach
- No Bra
- Sekirei
- RosarioXVampire
- Hell Teacher Nube
- Lucky Star
- Ai Kora
- Teppu
- Onani Master Kurosawa

Any suggestions?