It is the power fantasy done right. The protagonist becomes a slime monster but quickly becomes the most powerful being in the world. However, the story focuses on him building a monster nation and dealing with diplomacy, economics, and politics. Recommendation: The manga has beautiful, clean art. The anime has a slower pace but great humor. Watch the anime for the "feel-good" vibes; read the manga if you want to binge faster.
Fullmetal Alchemist: Brotherhood (Adventure/Fantasy) Widely considered a masterpiece. Two brothers use alchemy in a dangerous attempt to bring their mother back, losing their bodies in the process. Their quest to restore themselves becomes a sprawling epic about war, sacrifice, and humanity. Complete, satisfying, and brilliantly paced. hentaiforcenet best