Looking for manga that has a twist/twists that you never expected, can be a good or bad surprise. I am open minded to pretty much everything, but preferably a darker seinen-ish manga. Some examples to illustrate my point:

Ubel Blatt

Instead of Koinzell being the saviour and all that, he turns out to be the opposite. Also, the lances of betrayal being the true heroes.

One Piece

Ace dying and showing a darker side to the otherwise comedic series.

Aphorism

Innocent looking school turns out to be a bloodbath.

Usotsuki Mi-kun to Kowareta Ma-chan Totteoki no Uso

Mii-kun not being Mii-kun.

Full Metal Alchemist

Selim is Pride.

There's probably much more but I can't recall them now.
Thanks!

School Days anime xD

Pandora Hearts BUT, you can't take the story lightly, cause if you do, you will get lost or wont be able to measure the greatness and masterly of this story :3

Ganbare Seishuu! Ganbare Seishuu!

Bloody Monday and the sequels

Akame ga Kill!

Right from chapter 1.

Don't worry, after you read more, that won't happen anymore.

http://tvtropes.org/pmwiki/pmwiki.php/Main/PlotTwist

Have fun. See you in six months.

[color=green]"Officially, this machine doesn't exist, you didn't get it from me,
and I don't know you. Make sure it doesn't leave the building."[/color]

Not a manga but Hakomari light novel has got the best twists I've ever experienced. I don't think there is anything at the same level of those twists.

What I like in Trivial Pursuit style. Pick your category:[img]http://i379.photobucket.com/albums/oo233/Reid4891/Manga/trivia-1.jpg[/img]

Flowers of Evil, maybe?

Quote from Toto

Don't worry, after you read more, that won't happen anymore.

http://tvtropes.org/pmwiki/pmwiki.php/Main/PlotTwist

Have fun. See you in six months[/url].

Loolll, seconded. I dare say I'm not surprised by any twist, plot turn or unexpected event anymore.

As the recommendation, maybe these following mangas will catch your interest.

Liar Game

As the outcome of each stage and how they win

One Outs

Same, how Tokuchi handles things

Man is more ape than many of the apes.

threads of time

Sometimes I think that about half of my manga recommendations here are Naoki Urasawa works.

I really recommend 20th Century Boys. It has lots of unexpected twists, I don't even know how many times I was looking at the page, completely shocked. And, of course, it's a masterpiece of a genius mangaka. Just stay away from spoilers.
Monster is also very good, but doesn't have so many twists.

Diece

the breaker
kilico

[img]http://www.nodiatis.com/pub/19.jpg[/img]
[img]http://www.dragonflycave.com/wpay/alakazam.gif[/img]

Quote from zero-chan

threads of time

That one, totally.

And for my contribution: Shin angyo onshi

Innocent Venus--->Watch the anime! 🙂 You will love it!! Dont read any spoilers or wiki it! 😲 😲 😃 😃
King of thorn---->Movie was amazing!! 😃 😃