Yugioh season 0 is a wonderful anime to watch even if you never cared about the modern card games. Season 0 is a fun pace show with various degrees of engagement that will quench that thirst of wanting something interesting to watch.
The main cast is very lovable, and the situations that unfold around them are just as interesting in this anime depicting the contrast of good and evil ethics.
By using an element of a game, this show is able to tackle the two together in a surprisingly good philosophical digest, food for thought.
Season 0, by itself, is a fun 20+ series where you often see various situational dramas, sometimes depicting real life scenarios, and the punchline of the ethically brave characters triumphing over counter evils, whether its in a societal topic, a personal topic, or a natural conundrum.
The flaws, is that it's still aimed towards young adults, so this anime won't stretch into absolute realism for the sake of its plot. Which isn't bad, but don't expect a serious blood story. Expect a situation where the hero's always win. It's a classic saturday morning cartoon, and I wish the later Yugioh series carried over much of this season, especially the missing friend in the main cast. They need to bring her back.