✔ 最佳答案
One Piece is a great adventure manga, I'd recommend it.
There's also:
Fullmetal Alchemist
Inuyasha
Code Geass
Fairy Tail
D.Gray-man
Rurouni Kenshin
Black Cat
Holyland
History's Strongest Disciple Kenichi (haven't read it, but have heard good things about it)