In no particular order:
1. Kiichi!!
2. Death Note
3. Oyasumi Punpun
4. Mushishi
5. 19 Days
6. Phantom Tales of the Night
7. Monster
8. Hunter X Hunter
9. Three Days of Happiness
10. Gangsta.
God, I wish I could name more! There's so many other absolutely amazing manga/manhwa/manhua out there!
