Personally i believe that fate/stay night needs another season. Fate/stay night is an awsome anime and still has so many different story arcs and story lines. The main reason i want another season is because i REALLY want to see DARK SABER! =P

*update*
So... I just finished air gear and i also have to agree with the many who say that air gear needs another season. Air gear's ending was incomplete.

Also FYI haruhi is going to have a second season for those who didn't know! Newtype confirmed it.

I prefer to see a second season of trinity blood or air gear but air gear the serie continue on the manga but it will be best for serie i think

Berzerk

manga kept on going, where as the anime stopped at a big cliff hanger

Yeah i think Air Gear needed another series. Also the show Onegai teacher.

ice741

Personally i believe that fate/stay night needs another season. Fate/stay night is an awsome anime and still has so many different story arcs and story lines. The main reason i want another season is because i REALLY want to see DARK SABER! =P

Sequel for Fate/Stay Night is out, on manga at least, it's called fate/zero

personally the show need to have sequel is hunter x hunter imo.
Slam dunk would be awsome too, but i am not too sure how good it could be.

I think OHSHC needs a second season, i'm not sure if they are going to have one. but they should.

The animes that I think need another season are-
Samurai Champloo
Chobits
and...
I forgot the rest. =\

Id kinda like to see the folks at gainax do something more with FLCL. the ending was great but 6 episode kinda leaves you wanting more.

The Melancholy of Suzumiya Haruhi is probably the only anime that I can think of. I wouldnt mind watching some more of other animes, but I think that many wouldn't be as good. I think Elfen Lied could use a sequel; I thought the ending was totally stupid.
Oh and I want School Rumble i. Does anyone know where they are on that?

and as for hxh...hasn't there been like 3 OVAs already?

Urgh this topic just got me fired up! There's quite a few anime that totally want to kill the viewers in ending it just like that you know? Here are some that seriously, I must have a second season of.

Hikaru No Go - Alrite, perhaps you think -- what 75 episodes not enough? -- however the ending disturbed me, so very much. Didn't get to see Hikaru kick Akira Touya's ass, or the 'divine move' and more so the Asian Go Tournament where Korea, Japan and China would compete one another. Anyone know if any OVA or anything of this that I might have missed it?

Ouran High School Host Club - Typically to see some relationship development between Haruhi/Tamaki/Hikaru and anything else! If there is a second season of this, seriously it better have some plot and characterisation advancement. And a plus, everyone just want more of Tamaki he's just oh too adorable!

His & Her Circumstances (Kare Kano) - The manga continued where the anime just cut off and end it so rapidly. Not to note the last few episodes was poorly made! I wouldn't mind another season of this because the later part in the manga is heaps good. Hate it when anime rushes things but thank the Lord we have manga to cover that up.

Samurai Deeper Kyo - Honestly, I can't get enough of Kyo! He's just... uh -- beautiful -- in an evil way hahaha Well the anime did an okay job with the attempt to tie up the plot they had there. However the manga storyline and suspense, also new characters are way awesome! Thus, I want more!

Fate/Stay Night - As people stated above, it really does need another season period!

Spiral - At least the manga is still going but if there is a second season of this I wouldn't mind as well. There's a lot of potential in this series so I'm collecting the manga of it! Also the anime left it off poorly done >=[ Wasn't happy!

Air - Hahaha okay I'm sorry but I must add this one in. Why? The ending made me cry so much that I "demand" a second season that would show more of what to come of the male protagonist and his search for the "wing one", also please this time happy ending to sooth my wrenched soul.

Wow, you must be thinking I'm so free to be writing that much but yes I am. The holiday is here and is this how I'm starting to celebrate it? O_o Perhaps! >=P

I second Hikaru no Go. I want to know what happens after he becomes pro and becomes a higher dan player. Plus Hikaru just has to kick that "bowl cut's" ass doesn't he? Eventually? Come on.

#1, without a doubt, no hesitation, would be Black Lagoon. After two seasons of an adrenaline rush, I'm suffering withdrawal. Also, there are many questions regarding Revy's past that need resolved.

The next season should have more Revy T&A though :)

Hmm.. I think that Fruits Basket needs another season.. The first season didn't really have an ending, and there is much more to the story.. So it would be great if that could happen. Also, Ouran High School Host Club could use a second season.. I'd really like to see what happens next.. (although I suppose I could just read the manga).

I don't know how this fits in, but I guess it would sort of be like a second season to X.. I wish that they would've made a Tokyo Babylon anime.. That would have just rocked my socks.

Also, InuYasha, although a lot of the episodes are fillers, should come to some sort of conclusion.. Because the last episode now isn't an ending at all.

Fruits Basket, definitely. The anime shows only part of the story, and the anime didn't have much of an ending either.

In fact , the line "heaven feel "is the real ending of fate stay night.but "heaven feel"contains SEX, if it would be in anime .the part of sex would be delete Undoubtedly ,I really can't image how the drama will be without such a important part.

PS:I indeed like "dark sakura"

the other anime i think need another season is claymore,hikaru no go,GTO,SLAM DUNK.Full metal panic,etc.