This is one of those animes that just make you happy. I have to say I quite like the layout of the series and how it's made up of lots of mini stories. It makes it easy to watch and you can just play it whenever you just feel like having a laugh. Also throughout this series you come to love the main character. He's got dark humour, always seems to know what he's doing and is literally the strongest and most sadistic person in hell (although maybe I'm not making him sound appealing). I would highly recommend watching the series, it's something with character so thatyou will actually remember as well (unlike a lot of animes nowadays which follow similar styles and trends-not to say they are bad though)

Oh and the art style is brilliant!