My few favorites in no order
Kono S o, Mi yo!
Nemureru Hoshi
Sun-ken Rock
Sekitou Elergy
Nana to Kaoru

Needs Attention: Nemureru Hoshi

bokurano
narutaru
gunnm (battle angel. i hope james cameron will make an awesome job on this)
eden
solanin
blade of the immortal
dragon head
mpd psycho
akira
fist of the north star
yokohama kaidashi kikou (ykk)
me-teru no kimochi
maison ikkoku
hoshi no samidare (lucifer and the biscuit hammer)

i need to read more. 😀

20th Century Boys
Kokou no Hito
Oyasumi Punpun
Battle Royale

These are my personal favorites, but it's good to enlight all of Inio Asano works. That guy is a freaking genius! Shinobu Kaitani's translated works (Well, Liar Game and One Outs) are pretty good too

Quote from sarah-eats-cupcakes

the best seinen is, without a doubt, Eden: It's an endless world!...it has everything i ever wished for in a story; politics, concrete science, realistic relationships and interactions between characters, characters weren't either "black" or "white", amazing psychology and insight into the characters' personalities and finally, the mangaka obviously did tons of research, all references to different religions and cultures were 100% accurate

so yeah, eden is my number one seinen...there are many other good seinen manga ive read but listing them in order of preference will be really hard

at the time i wrote this i completely forgot about oyasumi punpun and not simple......those three are the BEST seinen i have ever read 🙂

as sarah said, go for Oyasumi Punpun all of you.

i double recommend it

1. Dorohedoro
2. Needless
3. Until Death Do Us Part
4. Homunculus
5. Dogs: Bullets & Carnage

At first i wanted to add Deadman Wonderland... But WTF it's a shounen?!!

mine!

1.Historie
2.Vinland saga
3.Shamo
4.Vagabond
5.Ichi the killer
6.Berserk
7.Akumetsu
8.Battle Royale
9.Ubel Blatt
10.Onani Master Kurosawa

Baboon Power!!!!
Lets make Baboon Empire!!!
WHo WaNt TO JoiN 😕

#1 Berserk - #1 Onani Master Kurosawa
#3 Hellsing
#4 Vagabond
#5 Historie
#6 Sun-Ken Rock

[img]http://my.picresize.com/vault2/LIWTSV4SM3.jpg[/img]

in no particular order :

Monster
Historie
Vinland Saga
REAL
The Ravages of Time
Cesare
Giant Killing
Ookiku Furikabutte
Onani Master Kurosawa
Last Inning

Aa Megami-sama
3x3 Eyes
Ai-Ren
Blame!
Hellsing
Kazan
Planetes
Shin Angyo Onshi
Hoshi no Furu Machi
Kiba no Tabishounin - The Arms Peddler
Peace Maker
Gunka no Baltzar
Tetsuwan Birdy (II)
Aiki
Bastard!!
GUNNM
Red Eyes
Priest

In no particular order:

1. Historie
2. Acony
3. Uchuu Kyoudai
4. Mushishi
5. Cesare
6. Sprite
7. Vinland Saga
8. Ikigami
9. Kimi no knife
10. Bradherley no Basha
11. Shin Angyo Onshi
12. Omoide Emanon
13. Momonchi
14. Kiseijuu
15. Island
16. Hatsukanezumi no Jikan
17. G Senjou Heaven's Door
18. Bambino!
19. All Rounder Meguru
20. Shoujo Fight

I really enjoy YKK, Gantz, and Akira. I could read Hitoshi Ashinano all day... and I often do! 😀

Reviewer for animangareviews.tumblr.com
Just Doing It For Fun!
Lover of Seinen and One Piece!

in no particular order:

Vinland saga
Sunabozu
Dorohedoro
Black lagoon
Jiraishin
Parasyte
Kurosagi
Holyland
Yamikin ushijima-kun
Kazan

all these are mangas that I would read over and over and over again
wow exactly 10 o_o

[img]http://i.imgur.com/9BHy24f.png[/img]

Recruiting:
https://quicksandscans.wordpress.com/recruitment/

Seinen I savoured and swallowed
(No particular order within one paragraph)

1st: To be adored:

• Blood Alone by TAKANO Masayuki
• Otoyomegatari by MORI Kaoru
• Gangsta. by Kosuke

2nd: Skilfully told:

• Itoshi no Kana by TANAKA Yutaka
• My Girl (SAHARA Mizu) by YUMEKA Sumomo
• Ichigo no Gakkou by SATOU Nanki/ KIZUKI Akira
• Natsu no Zenjitsu by YOSHIDA Motoi
• Lying Mii-kun and Broken Maa-chan: Precious Lies by IRUMA Hitoma/ SATOU Atsuki

3rd: Science-fiction:

• Hotel by Boichi

4th: Unexpectedly thought-provoking:

• Solanin by ASANO Inio
• Kamisama ga Uso o Tsuku. by OZAKI Kaoru
• Hoshi no Koe by SHINKAI Makoto/ YUMEKA Sumomo
• Ai-Ren by TANAKA Yutaka
• Dansai Bunri no Crime Edge by HIKAGI Tatsuhiko

5th: Endearing:

• Molester Man by YOKO
• Ran to Haiiro no Sekai by IRIE Aki
• Emma by MORI Kaoru

6th: Action-packed and suspenseful:

• Until Death Do Us Part by TAKASHIGE Hiroshi/ SONG Ji-Hyoung (aka DOUBLE-S)

7th: Random:

• The Voynich Hotel and Nickelodeon by DOUMAN Seiman

[color=#8A795D]"Stories are what death thinks he puts an end to.
He can't understand that they end in him, but they don't end with him."

• Ursula K. Le Guin, Gifts[/color]

To be savoured:

• Blood Alone by TAKANO Masayuki
• Otoyomegatari by MORI Kaoru
• Gangsta. by Kohske
• Seishun Kouryakuhon by AKIZUKI Sorata

1. Gantz
2. Usotsuki Paradox
3. Kimi no Knife
4. Nana to Kaoru
5. Kanojo 51
6. Onani Master Kurosawa
7. (does Yuri count?!) - Hoshikawa Ginza Yonchoume
8. Gunslinger Girl

Honourable mention (awesome stuff...supremely entertaining, but just not serious or emo/wangsty enough for a seinen top, imho):
Beach Stars
Btoom!
Magetsukan Kitan
Boku no Futatsu no Tsubasa - badly axed
Claymore - too shounen-ey
Vinland Saga - ARC 1 ONLY... screw farmland saga.

Non-Seinen for Seinen lovers:

1. Kimi wa Petto (Josei)
2. Mako (published now, it'd be "Borderline H/ Seinen"... in 2002, it was H-manga plotporn)
3. Dokuhime (Josei?)