what anime do you think shouldve gotten more seasons(pretty shouldve had an ending instead of a big cliffhanger) and which do yo

Pandora hearts, they stopped suddenly.. i need to see more, all i hang on now is the manga :/ Yumekui Merry, i liked every episode.. want more :D Houyka More curiosity and solving puzzels. Angel beats, i want to know more about the other characters Arcana Familglia, this was a fun anime, they could have done more.. black bullet, I want more justice.... One week friends.. no more friendzone... the Pet girl of Sakurasou, they could easy make another season, they already kinda introduced more new characters :)