I never completed Phantom Hourglass because, like Yahtzee, the Temple of the Ocean King can go fuck itself. I'm not doing the same fucking puzzles each time I re-enter, while having unbeatable bad guys chase after my ass on a TIME LIMIT. I'm pretty sure it's the only Zelda I haven't completed (besides Zelda II), but it's the first I just refuse to complete.
In regards to Spirit Tracks, I'm going to get it whether it's up to par with the rest of the series (yay fanboy-ism), but I really hope it doesn't repeat everything I disliked about PH.