Taru wrote:

Only the few parallel storylines of the human pets are actually interesting or a little "deeper".

Personally, I find the whole story of Frederico (includes King Howert), Niss and pets that are included to their storylines (Roca, Clive, Xaolan) interesting. Another interesting story would be the somewhat combined story of Angela, Eva and Qlaya.

But there is no main storyline imo, your character is stranded and experiences a load of different adventures, but the character does never really follow a goal of "returning to the old life before the ship wreck".
In the what I'd call "late game", the player's character is more or less bored, Deadly Hit quest is mostly made "for the strong endgame player who is bored because of lack of challenges".

I am personally really interested in what the future plans once were for the storyline, the never-ending Ocean Heart Pieces mystery, what would hide behind that forever-closed door in Maka Cave, but yeah, we will never find out.

I read that the ocean heart pieces were a quest in the Chinese version that just gave you a reward after collecting several of them. And that closed door was always nothing but rumors ranging from ending the game to an unknown quest... We'll never know... I guess it's up to fan fiction writers and our own imaginations...
As for me, Arez was the one storyline that held me captivated...
BTW, hi Taru :)