Huntum sea monster wif sharp stik. Good aim. use bow and arrow wif rope to use drag and knife technique. Makeum healthy paste from water plant. Useum shell and bone from dead sea monster for armor. Commandum the power of the sea. Makeum and sail ship for faster travel. Swimum and dive under water hold bref for long time. Commandum sea creature when near water. Findum treasures better than other. Sniffum enemy wif good smeller. Catchum fish for eat and feel good. Fire monster run in fear.
That's excessively focused on water, and I'm not sure if that's a joke.
But, I do like the idea of having a character who used to be a sailor. Problem is, I don't know what his skill trees would look like, and marksmanship wouldn't be one of them.
Samurais and other mounted warriors are known for being as well trained with bows as swords. However, I think we've got our oriental classes fairly well covered (Wizards oriental in ethnicity, Monk a hybrid of things). Then again, what's wrong with more Asian? Asia is a bloody big place.
Problem with samurais specifically is I think they'd end up too similar to the Monk in the fast but weak melee DPS theme.
So I think the rogue/thief or amazon angles are more likely.
Problem with rogue/thief: I don't think stealth works well at ALL in the Diablo style hack and slash gameplay. So really it'd have to be a ranger or assassin or something along those lines