I'm a big Wind Waker fan, so when I first heard about Phantom Hourglass, I was really looking forward to it.
When I played it, I was really let down.
Story
I really liked the story in WW, but PH really did not feel like it built-off of WW. Plus parts of the story feel like they were taking from LA(Ocean King=Wind Fish, Bellum=Nightmare). I really had no interest in saving the world of the Ocean King, from Bellum. The story felt like it was thought up in about five seconds.
Gameplay
I found the gameplay to be ok. I actually like controlling Link with the touch screen. One thing that does bug me about the game is the dungeons. They all kind of felt the same to me, plus the parts where you had to take notes, to help you later on in the dungeons did not help make any of the dungeons feel unique.
Sound
The game sounded nice, but none of the songs in the game really stood out.
Sailing
I liked sailing in WW, but I feel that they ruined it in PH. Sure there were more enemies out at sea, but it felt lifeless to me. Plus having to pull out the seachart every time I wanted to change direction, or make a small change of course when sailing got annoying.
Temple of the Ocean King
On paper, the idea of one big temple that you have to keep going back to sounds interesting, but when playing the game itself it gets really annoying. Plus I felt that all those repeat trips to the temple of the Ocean King were just a way to make the game a little bit longer.
Those are my reasons for not liking Phantom Hourglass.