Gantz 8/10

 Gantz has a special place in my heart, since it was one of the first "adult" anime I saw as a kid, and even after rewatching, I must say, it held up pretty well. That's mainly thanks to the amazing writing of Hiroya Oku. 

Magi 7/10

Magi aka Magi: The Labyrinth of Magic is a fun shounen anime without much fanservice (rare these days), but lots of heart. I don't know many anime that display the Middle East, especially in a positive light, but Magi does an exceptional job at it. They explore old fairytales like 1001 Arabian Nights, having characters like Aladdin, Sinbad, and magical djinns, plus lots of clever story lines!