I just finished the seven deadly sins anime. Wow, what a ride. I was pleasantly surprised by how much I enjoyed the first season. I was not expecting to like it as much as I did. As the seasons moved on, I came to realize that season 1 is easily my favorite.
The seven deadly sins is a pretty interesting fantasy world. Melodias is actually holding out on a lot of relevant information and the storyline can get really convoluted. Still season 1 is pretty great. And full of surprises. I imagine that people that haven't had any exposure to the manga(like me) will really enjoy it.
If you are looking for mostly lighthearted fun action adventure with plenty of gags and silly moments check this out.