When is a good time to end a manga?

I love mangas that are short and sweet (which explain my love for fanfics) and Mangas that know when to end things, aka knowing their limits

Obvious example are Bleach and Naruto who don't know their limits, the company desperately milks profits out of these 2 animes and thus constantly getting more and more haters in the process. (-rep me, i don't care. I'm proud of my hatred.)

I believe the time to end an manga is when the author knows that he has no more ideas/passion/l33t storyline for the manga. Ending it is the best way.

The author can leave the reader with a hint of a season while taking a break, gather more intel for a continuation.

A good time to end a manga is when the artist feels that he has accomplished most he wanted to with the characters (as in portraying them and getting people attached to them) and when the plot has been built up good enough to get people drawn in.

A good example for this is Cowboy Bebop. It wasn't long but it was long enough to get you attached to the characters and feel the gravity of the plot, so they had their finale at the best time, when people still cared about it. When you draw out a story (manga) people tend to get less attached to the characters, hence why the finale would have less of an impact on the readers.

I'm not saying every manga has to be short, but from my experience I'd say that mangas who are shorter tend to leave more of an impact on me then longer mangas. (When the end.)

Once the characters are developed, the problem is solved, and there is nothing much more to do besides add useless characters and/or ideas for the sole purpose of longevity.
I've found that I like shorter manga, as they leave a simple but thoughtful message in most cases.

Hm...this is a tricky question, because you never know what could have happened in a manga if it went longer. However, I do agree that a lot of series go a lot longer than they should have, and usually those series have a horrible or wtf ending. That's why I tend to stick to shorter manga series. They also keep my interest more, and the stories tend to be less stretched out.

The only exception is One Piece...and that's cause it's fucking fantastic and Oda is a genius. I'm 100 % positive that we won't be receiving a bad ending from that one.

Three words: To Love Ru.

Hah... that was shit

Hold on let me elaborate

I started reading that comic a while back, but it was I guess close to 200 chapters so I wasn't to keen on reading 200 chapters only to end up stopping
It was okay, just a cute like mishap manga I guess
Eventually after a couple of hours I just got tired of it
So when I was on onemanga and they announced it's end I was like, okay, I wanna see how it ends
I find out

Now back on topic
I think it really only matters how it ends
If it doesn't give much closer, it's pointless
If it ends too soon for the author to honestly get the story out, then apparently everyone got tired of the BS and quit supporting it.
Example: Dual Arts
Look that up
Now a series like Naruto or One Piece where there's a goal that's far off in the future, those give it a chance for longevity and an easy way to close out, a series that involves a love story, like School Rumble or love hina, gives you 10million twists and turn before it decides to let the fans breath a sigh of collective relief
I personally say leave the comics to more than 1 writer or artist, make it a big thing like the western market and fans get a chance to selectively choose what they like. The Series Witchblade goes from heroine to heroine, just like there's a new Batman. Plus, things progress faster over here.

When The Best Friend Dies!

Well I Dont Know. Probably When Everything Is Solve?

It should have ended 100 chapters ago.

I prefer them to be shorter. I haven't read that much, so this opinion is completely subjective, but I haven't read a manga that was really that great that was hundreds of chapters long. Yokohama Kaidashi Kikou was alright, but it could have been half as long.

Case Closed Is An Example Of An Ongoing Manga That I Find Boring Now. Sure First 200 Chapters Were Good And All But It Got Boring. Should End ASAP!

When the main plot is resolved. As a number, I feel that any story worth telling can probably be told within 20 volumes (which is why I stop buying a manga if it exceeds that number).

It all depends on the manga.

Just after the climax. Having a dragging ending ruins the impact of the story.

well i like mangas that have around 24 chapters... mangas (and anime) that have over 50-100 episodes are getting tiring... (never watched naruto till the end or one piece (never started reading/watching it because of the number of eps) but i like it when everything ends okay. (i hate endings when they leave everything hanging and let you imagine it... i mean i imagine it they way i want to... but i sometimes imagine it the way i dont want to, it is fun tu imagine things but too see it actually ends the way you like it is the best :P)

I don't think a manga ever has to end, especially when the premise to a story is simply the everday adventures of the character's lives. A story has to be as long as is need to tell the proper story the writer want to convey, and if that story is the life of this person or that person, then let it be a long process. If you can make readers fall in love with your character by making them un-cliche, unique, or just really relatable, then the reader will care about the character for as long as they would care about any friend in real life.

Characters like Naruto can last so long because he wasn't the greatest ninja around or liked - heck he wasn't even any good at being a ninja so he couldn't take the label of being "underestimated". However, he transended the traditional role of the hero - even the underdog hero - to where he succeded only by determination. Naruto made that concept cliche, before him the hero had a secret weapon or was "destined" to be victorious. He even goes above traditional japanese values - like honor in revenge - in the later mangas ("fight" with Pain). This keeps the character ever evolving so there is no need to end his story.

Peoples stories don't end till their final breath, so why should mangas be any different? Let the character play all the way through their story, not just a segment of it for the reader to see.

American comics can do it with spider-man and batman, their lives are told and unfolded in front of the reader's eyes for a very long time because people are dynamic. Their story is never over.