Growing up in the USA I always thought American animation was good until I watched my first Japanese anime. The amount of detail and creativity put into every episode was amazing. There are a few ‘cartoons’ I still watch on occasion but the majority of the animation I watch is Japanese. Currently, my favorite anime is “That time I got reincarnated as a slime” 転生したらスライムだった件 (Tensei Shitara Slime Datta Ken).
If you like “That time I got reincarnated as a slime”, I recommend to check “神達に拾われた男(By the Grace of the Gods)”.
It has some common points(Reincarnate in another world, slime), but they are completely different stories.