You stopped watching Gantz because you got tired of sitting through 24-minute episodes consisting entirely of:
- something bad happens/kei (male kei) is a total douche for no reason
- Kei is a total douche for no reason
- characters argue about shit while being attacked/killed/whatever.
- Kei continues douching it up
- 22 minutes later, the episode ends without resolve, or with a character death, or maybe with Kei just being a douche
Seriously. I got so angry sitting through episodes watching Kei being a total fucking douche while everyone sits around bickering while they're getting the shit beaten out of them. What's that? Oh, someone's being attacked? Let's save them! They're 50 fucking feet away, but it's going to take 10 FUCKING MINUTES OF THE EPISODE FOR ME TO GET OVER THERE AND ONCE THAT HAPPENS, I'LL PROBABLY ARGUE WITH YOU OR WHINE ABOUT NOT GETTING LAID.
God I hated Gantz so much. And mostly because the story is pretty cool. Fucking GONZO just seriously took a massive shit on this one. I have no idea whether the manga was good, but the anime was utter bullshit.