I feel like too many people have too high of expectations of this show, seeing as it came from the mind of Dan Harmon, one of the creators and the main writer for Rick and Morty. But here's the part that blows my mind: It's a LOT like Rick and Morty. It carries the same quick-witted humor and social/familial dilemmas, all while having fun reinventing the origins of many aspects to mankind, with a heavy Greek myth twist.
It starts out a bit off, to be honest. I felt like the modern speech infused with ancient Greek times was a tad annoying. I feared this show was going to try too hard, and just end up flopping. It had that atmosphere the first episode.
I am glad I stuck through it because it only took me through the second episode to really start getting into it. A lot of the fun has to do with putting fun spins on Greek gods. It exposes the Greek gods for what they really are: just like mortal humans, only with the gift of immortality. They're just as egocentric, crooked, zany, and erratic as mankind. They have family problems. They are NOT all-knowing, and they can have feelings.
Let's just take a moment to mention how awesome Matt Berry and Richard Ayoade are. I might be biased as a huge "The IT Crowd" fan, but those guys are just great. And I'm fast becoming a huge fan of the character Hippocampus, for a fish he's really got some huge balls. The way he deals with characters like Prometheus, or even his own step-mom. Pretty badass.
There is a lot of subtle humor too. Silly humor, cynicism, dark humor, irony, you know, the fun stuff. Like Deliria forcing two mortals to fan her while basking next to large fire lanterns. Or how little the lives of mortals are valued, by both gods and humans (and monsters). It's a good show, give it a try if you like adult animation and Greek mythology.