I would like to help whoever is out there and start a discussion on what to read next if you are looking for help for new series to get started on.

I primarily like to read: Psychological,Tragedy, Romance, Supernatural, Horror, etc.

Lengths:
~Short Manga: 1- 20
~Medium Manga: 20-75
~Long Manga: 75-150
~Extremely Long Manga: 200+

I know that you mentioned that you want to help others find something to read but are you, yourself, looking for something to read within the categories and lengths you've mentioned?
If so, what length do you want to go for first and what genre/s are you most interested in reading at the moment?

________________
Remembrance, a forsaken thing that revokes ignorance and leaves people in doubt, is my only redemption and solace deep within the cascade of white.
* * * * * * * * * * * * * * * * * * * * *
The evergreen trees speak of days long past when music mingled with the wind and sweet murmurs brushed our cheeks.

Yes, I have been looking for some new series to read.
I think 'd like to read a medium manga series for now; but any length is fine really. Currently I'm reading some other books-- shorter manga series, and some other books not pertaining to manga.
I for genera wise I usually stick to reading the same genera.

I'm pretty fond of these series:
Aku No Hana (The Flowers of Evil)
Shiro Ari
Pureblood Boyfriend
The Castle in the Woods
metronome
Oboreru Knife
etc.

Do you have any suggestions for what I should read?

Here are some recommendations based on the genres you mostly read and series you are fond of:

20 chapters or more:
Ao no Fuuin
Houkago Hokenshitsu
Ryouko no Shinrei Jikenbo
Shinrei Tantei Yakumo - 'Akai Hitomi wa Shitte Iru
Boku no Chikyuu o Mamotte
Kanojo o Mamoru 51 no Houhou
Meteor Methuselah
Nineteen, Twenty-One
Global Garden
Mikan no Tsuki
NG Life
Mizu ni Sumu Hana
Gwisin Byeolgok
Kagerou Daze
Hatenkou Yuugi
Ibara no Ou
Threads of Time
Switch

20 chapters or less:
Watashitachi no Shiawase na Jikan
Hana wa Knife o Mi ni Matou
Covered in Cinders
Fetish
In the Mirror of Death
Miyuki no Ori
Ningyou Saisei Koujou
Rokuyoku
Yawarakai Kara - especially ch 2
Visukiisu no Akai Ningyou
Uroboros no Wa
Delivery
Kanojo ga Tonda Hi
Airuika
Nekomori
Kimi ga Uso o Tsuita
Puzzle (MORIE Satoshi)
Kuro Tenkousei
Transient Flower
Boku no Hitsugi de Bansan o
Deep Love - Ayu no Monogatari
Haikyo Shoujo
Hira Hira (AME Arare)
Kagerou Inazuma Mizu no Tsuki
Kami-sama ga Uso o Tsuku.
Kudoki - Shinyaku Kabukie Maki
My Heaven
Rec - Kimi ga Naita Hi
Shadow of Visions
Shirahime-Syo
The Snow Queen
Without the Sun
Zusun
Kami-sama no Sonata
Kuraku Naru Made Matenai
Meikyuu Yaburi no Hananusubito
Nakizakura Kitan
Tokidamari no Hime
Hiki
L∞P
Zankoku na Douwatachi
Variante
Lore no Mori
12-ji no Kane ga Naru
Ana no Mujina
Oni ni Itaru Doro
Rasen no Kioku
Kieli
The Black Cat
Evil's Return
Akatsuki no Fumi
Flip Flap
Hanshin
Monster and Child
Hello Baby
1/2 (SHIMOKITAZAWA Mitsuo)

Yeah..... sorry the list is so long. I got these all from my complete list (except for three of them that are on my reading list) and most of the 20 chapters or less are either oneshots or 2 volumes with the occasional 1, 3, or 4 volume ones mixed in there.

________________
Remembrance, a forsaken thing that revokes ignorance and leaves people in doubt, is my only redemption and solace deep within the cascade of white.
* * * * * * * * * * * * * * * * * * * * *
The evergreen trees speak of days long past when music mingled with the wind and sweet murmurs brushed our cheeks.

Watashitachi No shiawase na jikan
Hiki
Lore no mori
Fetish
And some others on your list I've already read but thank you so much, I will deffinetly check out the ones that I haven't read

~thanks so much ^^

No problem. I probably should have checked your lists prior to submitting my post in order to avoid that but .... too late now.

________________
Remembrance, a forsaken thing that revokes ignorance and leaves people in doubt, is my only redemption and solace deep within the cascade of white.
* * * * * * * * * * * * * * * * * * * * *
The evergreen trees speak of days long past when music mingled with the wind and sweet murmurs brushed our cheeks.

No, it's fine!
I am actually glad that you posted all of those; since I'm still updating what I have read and stuff.
I'm glad that you read those series, I thought (the ones that were listed) were awesome! I liked those ones a lot. What did you think of Hiki?

Loved it. I liked the way that the ghost showed up and how It gave an interesting feel to the story. It's one of the only horrors this mangaka has ever worked on so I had to read it. Her story Mossore is hilarious. It's stupid but funny. If you're into comedy you might want to try that one. She also writes a lot of yaoi.

________________
Remembrance, a forsaken thing that revokes ignorance and leaves people in doubt, is my only redemption and solace deep within the cascade of white.
* * * * * * * * * * * * * * * * * * * * *
The evergreen trees speak of days long past when music mingled with the wind and sweet murmurs brushed our cheeks.

I will look at that. What are some mangas that you like; what are some of your favorites?

*Feel free to PM me!

There are some really good epic seinen out there that might kind of fit what you're looking for.

* Eden - It's an Endless World! - Psychological and tragic elements. A really unique sci-fi manga. It has some truly unforgettable scenes that few other manga would dare to write.
* 20th Century Boys - Psychological, horror/suspense. Another really unique manga, but you need to keep in mind that the art style is very un-cute. It's a surprisingly fast read, but don't drop it before finishing the first volume.
* Shin Angyo Onshi - It's a manhwa, and borrows a lot from Korean folklore. It's not a romance manga, but romance plays a strong role in the male protagonist's motivations. It features tragedy and it's fairly psychological, but it's mainly action/adventure.

Some shoujo also come to mind...

* Tenshi Kinryouku - My favorite manga. The plot meanders a bit at the start (I liked the characters, so I stuck with it). When a certain dramatic events happens, the plot goes into overdrive. Genres are "Action Adventure Comedy Drama Fantasy Gender Bender Historical Mystery Psychological Romance Shoujo Supernatural Tragedy". The list there omits horror, but there actually are occasional horror elements.
* Kare Kano - My second favorite manga years ago. I might put it at third or fourth now because I've changed. It has psychological and romantic elements.
* Furuba - I loved the romance and characters. It has scattered supernatural/tragedy elements and is quite psychological.

For a change of pace, so other random recommendations:

* Angel Densetsu - My favorite comedy manga. The atmosphere is completely different from the author's other manga that you've read, Claymore. The art is not as bad as it looks.
* Aishiteruze Baby - My favorite romantic couple. The summary on the series info page does it justice.

Most of these manga are around 20 volumes, I think.