Anime sequels

I just finished watching Jungle wa Itsumo Hare nochi Guu(Good shit for laughs) and felt it was very underrated. But after watching so many different anime series, I realized that some of them were missing something or left on a cliffhanger because either the budget wasn't enough for the next year or the creator wanted to abandon the project. Here I am, thinking series like Hare+Guu, History's Strongest Disciple Kenichi and Kamen no Maid Guy should deserve a second chance in the industry after leaving us a cliffhanger ending so that they might continue it in the future.

Name some anime you felt that deserve a sequel.

On a side note, does anyone know if there's a English-language publication for Hare+Guu? I want to read where the anime left off.

Air Gear, well more of second season Screw it, keep at it till its up to date with the manga.

Great Teacher Onizuka!!!!!
Slam Dunk!!!
Eyeshield 21!!!
Hajime no Ippo!!!
Ichigo 100!!!

well those popped out of nowhere...XD

Kämpfer... Totally.

Golden Boy in my opinion should of had 6 more episodes I mean don't get me wrong I love the series, but I wish they would have gotten to the part where he met the yuri couple. If they do ever decide to do a sequel they better get Doug Smith for the English version again cause he was the best comical voice actor for that show back then and it wouldn't be the same without him.

This and Kannagi. I don't understand why Kannagi didn't take off more than it did, what aspect of it didn't people like? I'd love to see a second season.

Nana, just rewatched it and I seriously hate the first-season ending. What's worse is that they have said that they will make a second season when the manga in finished. But the author was hospitalized some time ago and upon her release she stated that it's unsure if she'll be able to go back to work and finish it.

Ah well.

Hmm.
Kuroshitsuji.
I do not want Alancy.
I.
Want.
Ciel.
>=(