I'm looking for a manga like Planetes, 20th Century Boys or Eat-man. A manga that makes you think, like a psychological thriller, or has an ending that is totally crazy and changes how you were looking at the manga. Eat-man totally freaked me out, it was great.

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Familiarity, the first myth of reality; what you know best, you observe least.

Monster ?

uhhh
Code Geass had a nice twist

Second Monster.

Nijigahara Holograph also is great that way, but it's a one volume thing, sadly.

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Reviews of my Work:
You are kind of boring - Blackorion
Congratulations! Ur an asshole! - tokyo_homi
Your awesome!!! - Cherelle_Ashley
NightSwan also said that she wanted to peg me, once, but I'm not sure whether to take that as a compliment or a threat...

Pluto and The Hour of the Mice are current favorites of mine that have a psychological thriller thing, although Hour of the Mice may be more like a conspiracy manga. It you can handle gore (which I can't), Goth has the same style of MPD Psycho (but not as scarring).
Dolls, Switch, Himitsu, Parasyte, and anything really by TAKAHASHI Tsutomu are pretty good too.

also I recommended TAKAHASHI Tsutomu's works

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known as Lucifer / Killy69 / Guts / L41n / Lain Iwakura / Schrö.

I recommend Believers If you are 18+

That manga really makes you think about how persons act and why,

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