In two cases.
It either sucks so much that it
causes hemorrhagic fevers and
should be labelled UN 2814 ☣ biohazardous
or it is so awesome that I must actually
tell people about it.

Yeah I do sometimes.

Sometimes I have to comment to save the poor series. I see a lot of people bash many series, and there I am thinking, actually no, it's not that bad.

But yeah, sometimes I don't have anything to say about the manga, or like, it's too early to say much (few scanlations etc)

Ditto. There's not much of a rhyme or reason when I do and when I don't. It just has to be a strong opinion, either good or bad. Very occasionally, if I see that a series has a lot of comments that go in the other direction from my own opinion, I will post so that the other viewpoint (mine) is seen.

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If you've ever thought or said "Nice Guys finish last" and really meant it, then you should probably read this LJ post by DivaLion. It's incredibly insightful whether you're male or female.

From a bumper sticker I like:
"If you're gonna ride my ass, at least pull my hair."

Yes, and often. I mostly like to comment on the series/one-shots no one else has left a comment on, to give people an idea of what to expect.

Only once.
I don't even comment on the series I adore, much less the ones I abhor. (No rhyme intended.)

But when I do comment, I use effort. Which in return, is a real turn-off.

no, can't be bothered to

Where's the: When I feel like it option?

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It's completely arbitrary. Sometimes I just feel like making a comment and more or less just pick something at random off a list.

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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...

No...>_<
I might have written some reviews or w/e before I became active in the forum.
AH! I did comment on Beauty Pop when it ended though!

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♪MONSTARR~ will eat all your cookies and steal your bishies~♪ Φ_Φ

same here

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i only comment in three situations:
1: when i love the series. i think everybody said this.
2: if i hate the series and must warn others. everybody said this too.
3: if there is something troubling me. this is complicated because if i wanna know the answer, i can use the forums, but if its on some obscure series, nobody will leave a reply.
oh well. reason 4: if i feel like it. happens every now and then. just a random urge

That depends on what kind of series I am reading. If it has a great plot, good characters and a stable pace, I'll give it a good rating.

Otherwise, it's two thumbs down.

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See ya!

I read comments and look at the ratings. They are really helpful, but I don't completely trust them. In some cases it's better to make shure on your own.
I comment if the ratings are too good or too bad on my opinion and if I got something to say.

Yes, yes, yes! Every single time! I go as far as not marking the manga as "complete" before I've commented on it, even if it's those 16-page-long ones!
Also, I tend to make very long comments - and I apologize for that, for the record i.i But I just like to analyze it part by part: characters, story, art, twists, end...everything.

I tend to disagree with everybody else - it's been some years since I only read yaoi/shonen-ai and, I don't know if it's because I read too much, but I can rarely find one I really like.

Oh, and I also read everybody else's commentary, even if it's got like 10 pages of them.

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When life gives you lemons, you...make a loooot of yaoi! >3

considering all the manga I have read- I really think I should comment in all of them, but..... I'm so lazy.... (-___-)'''' I only end up commenting when by chance I scroll down all the way to the bottom of the page