I think you should take a look at Psycho-Pass if you liked the mind games in Death Note. It's got a really cool, dark future-world setting.
Also, I've started reading Korean manhwa (like manga, but Korean) and they're awesome! The stories and drawings are really good. "Solo Leveling" and "Tower of God" are two that I really like.
For those who love some spicy ones, I can recommend some
porn comics from here. They have this manhwa called "Secret Class", which I think is the best in that category.