Aria
Ares
Clover
Dear
Detroit metal city
Kiss xxxx and KUSUMOTO Maki's other series including K no Souretsu
Kurosagi Shitai Takuhaibin
Me & the Devil Blues
Mushishi
Suppli

edit: I can also list many underated Josei/seinen series, but i know they will be popular in future... like nodame cantabile which has already broken through the barrier.

Many of Manga-sketchbook and Mangascreener series are underrated.. what a shame because most off them are fantastic.

There will be bloodshed

Saikano

Quote from Criminal Intent

Quote from Domonkazu

Hoshi no Koe

Ahh yes. Never read the manga but the OVA was brilliant. The fight at the end was one of the most intense scenes I've ever seen in an anime. 😃

The OVA and manga made me cry.. one of the very few anime/manga that could trigger my tear gland, expecially for an OVA which was around 25min long... i consider this underrated as well

There will be bloodshed

Quote from Criminal Intent

Quote from Domonkazu

Hoshi no Koe

Ahh yes. Never read the manga but the OVA was brilliant. The fight at the end was one of the most intense scenes I've ever seen in an anime. 😃

you should read the manga, its actually better.

"we are people because of other people"
"I am who I am because of who we all are"

Trust me I've been looking high and low for it on the web since apparenty I have to pay for an IRC account and I'm kinda low on cash right now. 🙁

I'd also like to add X to the list. One of CLAMP's best. Overshadowed by Cardcaptor Sakura and it's various AU's and Chobits.

LOOK AT MY WITTY SIG!!11!!!!11

Quote from Criminal Intent

Trust me I've been looking high and low for it on the web since apparenty I have to pay for an IRC account and I'm kinda low on cash right now. 🙁

I'd also like to add X to the list. One of CLAMP's best. Overshadowed by Cardcaptor Sakura and it's various AU's and Chobits.

IRC lies.
It's a trick ze!
You don't really have to pay to use irc...

Yureka

[img]http://i45.tinypic.com/10pvn8y.jpg[/img]
（ﾉﾟ-ﾟ）ﾉ☆どぞ。
Have a star.

Well, I'm not actually sure if mine count as "underrated", but I personally haven't heard many people talking about them, so I guess so. I quite liked Mekakushi no Kuni and Ichigo Channel.
They were both quite original I guess. Well, Mekakushi no Kuni was anyway.
I also second Othello.

"If it's bitter at the start, then it's sweeter in the end.."

[img]http://img294.imageshack.us/img294/7051/bannerlh5.png[/img]

Quote from x91

Me & the Devil Blues

Damn near my favorite manga of all time.

Kurohime is excellent, and very much underrated

Listen here
Livin just to keep from dyin
[img]http://imagegen.last.fm/TheDarkTen/recenttracks/imgooley.gif[/img]

I second Mailru on Yureka and add Hitsuji no Uta.

poof "SHOUJOMAN IS HERE!"
Just Lynz, drop the -ajw

honestly going to have to toss Mx0 into this one now, although it got pretty good popularity on this site its getting canned so quickly means otherwise.

"Let's put a smile on that face."

c´mon Homunculus is not underrated.
It´s even overrated after vol. 6 if you ask me.

And just for the sake of reason here, there´s no shounen underrated, not really. Shounen has this huge market for it, and people buy all the stupid and void plots. Not to mention you might come across with unfinished pages, after all, you´re going to buy it anyways.

Seinen genre tends to be underrated.
Many Band-of-Hawks, Kotonoha and Snoopycool projects pass with very few readers "Me & the Devil Blues and Koroshiya 1 included".

Yes, I´m generalizing and nobody -should- care about it.

By all means marry; if you get a good wife, you'll be happy. If you get a bad one, you'll become a philosopher ~Socrates

Quote from Aamaro

Seinen genre tends to be underrated.
Many Band-of-Hawks, Kotonoha and Snoopycool projects pass with very few readers "Me & the Devil Blues and Koroshiya 1 included".

You're dead right. I admit, there does be the odd popular scanlation from them, but the majority of their stuff is seriously overlooked.

I think that a bunch of dropped projects are underrated.

If I had the skillz, I would start a group to pick up some dropped great manga.

Listen here
Livin just to keep from dyin
[img]http://imagegen.last.fm/TheDarkTen/recenttracks/imgooley.gif[/img]

My choice for most underrated manga: 3 Gatsu no Lion. Only a few chapters translated, but it's a seriously poignent story about personalities, loneliness, loss, and relationships. Definately worth the read and has my sincere wish for continued scanlations.

I also agree that Snoopycool and Kotonoha make great choices for scanlation projects - I've never been disappointed by their work (sure hope Kotonoha doesn't go through with their threat to discorporate at the end of 2008 - their loss to the English-speaking manga world would result in unnumbered tears!). I have to check out Band-of-Hawks.

Dragon Head
Companion
REAL
Riki-Oh
Koukou Tekken-den Tough & Tough

I'm glad nobody said Kekkaishi.

-GGpX

I run Illuminati-Manga. You're welcome.