Kicking off with my standard disclaimer – I’m not ruling out one day returning to any of these shows… it just might take a really, really long time for some of them, perhaps.

Gantz
The science-fiction concept had me hooked but after only half of one episode I had come to loathe Kei Kurono.
Having said that, I might finish this one day – or just read about the plot to learn of some unanswered questions I have about the scenario.

Black Blood Brothers
Of the three I’ve listed today, I think this might be the one I could return to in the future, because I’m curious about events in the prologue.
And I liked Jirou’s character but Kotarou was a bit much in that first episode for me to continue.

Dagashi Kashi
I felt like trying out a comedy and the idea of a sweet shop sounded pretty great, but despite a memorable design, Horaru was not so much charming as annoying for me.
Of course, is it fair to give this (or any series) just one or only half an episode? Not really… but then, I have so many shows I want to watch/try/finish 😀