I would say Phantom Hourglass. Aside from the carried over characters from TWW (Slyvester, Beedle, Tetra's Pirates, Tetra and Link, there might be one or two more that I forgot) I didn't care for any of them.

Ciela was more annoying then Navi, I didn't like her at all.

Leaf and Nevi were boring and annoying.

Oshus was this irritating old man that kept limiting what I could do and kept acting all condescending.

Linebeck was a irritating coward, who kept insulting me and acting like I was some kind of fetch monkey.

Bellum wasn't even a good villain! I didn't even hate him, he was sort of just...there.

All of the side characters were annoying too.

I just wanted to save Tetra, I didn't care if all of the other characters died.

Somehow though, even the TWW characters that were carried over still were lousy. Tetra was too mean and Link lost his personality.

But yeah, I didn't care for any of the PH characters besides the ones carried over from TWW. (and I only liked them because they were great in TWW)

But what do you think?

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My Zelda rankings and why