Constantine, easily. It was a brilliant adaptation of the comics, had a terrific cast, plot, and premise. Honestly, I think it was the best show since Breaking Bad. It never found the kind of audience it was looking for (mainly because they kept it on Friday nights), so NBC cancelled it. WB shopped it around, but it never did find another home. Instead of putting it on one of their channels, WB flat out pulled the plug. It wouldn't be so bad if the show didn't end on a cliffhanger. I just wish that SOMEONE would've renewed it for a small season of like 6 episodes or made a TV movie. But nope. It remains ended on a cliffhanger. Here's to hoping that Constantine plays a bigger role on season 5 of Arrow and we get to see what happened with the rising darkness

lol I had just gotten into Gravity Falls the day before they released they'd be ending it. As for actually canceled shows, Rave Master and Fire Emblem were really hard hitters for me. I loved those shows and I didn't even get to see how they should have ended.

For me it was the Wayan's Brothers; I had never watched their show and once I started and really got into it, it was cancelled not even a month after. Really pissed me off. There were a few series on Netflix that only made it to one season and I really got hooked into. There was also Victorious, iCarly that little by little started fading away and other secondary characters got their own spinoff; and Drake and Josh.- I have three nieces so I had no choice but to start liking these shows.
Other than that I wish Boomerang, old Cartoon Network like Cow and Chicken, Courage made their way back to stay. 

One show that I was bummed that got Cancelled in the 90s was "The Ben Stiller show" A REALLY funny sketch comedy show starring Stiller, Andy Dick, Janeane Garofalo and Bob Odenkirk, a show that had one brilliant sketch after another. It holds the distinction of winning a writing Emmy after being axed. Which is CRAZY when you think about it.

I miss Invader Zim. A lot. I don't know why they canceled it in the first place, but stuff like this happens, sadly.

I hated the fact they cancelled Deadman Wonderland after a single season. The ability to manipulate your own blood as a weapon was really cool to me, and the insanity of most of the characters was interesting. I also loved the "Prison forces inmates to fight to the death, but the outside world knows nothing of it, or thinks it's staged" concept. Another interesting plot device was they wore collars that injected poison, and if they didn't win fights or events for in-prison currency, they couldn't afford the buy the daily needed antidote and would die. It added an extra element of suspense, never knowing if they would survive even one more day, regardless of the fighting or twisted games they were forced to do. And another thing was if they lost a fight and survived, they would be forced to have a random body part removed while awake without any anesthetic.

It was definitely a twisted show, but I thought it was amazing. Apparently I'm one of the few who think so

Recently I started watching Bomb Girls, Which was canceled in 2013. And like, That really upsets me because it is so good! At least they were nice enough to end it off with a 2 hour long movie so...

I just want to thank everyone who has participated in this discussion. It is so awesome that one of my topics has stayed open for so long. I have enjoyed reading all of the responses, and look forward to reading more. Those who have already participated, feel free to share an update of any other shows that have been cancelled on you. I hope that this discussion continues for a long time, and that everyone else has enjoyed it as much as I have.

Thanks again,

Wolf

Mynamescox44 : This show sounds incredible. I'm not sure why I have never heard of it until now because it sounds exactly like the type of show I would be extremely interested in. I'm going to have to check it out regardless of it being cancelled. Firefly was worth checking out, so I don't mind checking out cancelled television shows.

Thank you for sharing,

Wolf

wolf742 :  
Well, I don't know if you really care for anime or not, since that's what it is lol. There's a lot of people out there who for whatever reason just either won't give it a fair chance, or just refuse to watch it altogether. Though if the stories good and the show entertains, I don't see the difference

I hope you enjoy the show, though you'll have to read the manga to actually finish the story.