I really like a lot of the new designs in general, I find that hair-stuck-to-skin look that a lot of the ghosts have due to the water pretty creepy, and the fights seem a bit more aggressive and intense than usual, which is something I've wanted for a while.
Some of them look a little dull however, like the old guy who is like a mixture of the wandering monk and the FF2 villagers, and the normal looking people (I've no idea how to phrase that any better). Also, as much as the falling lady scare is pretty cool, who thought it was a good idea to make her face so goofy? Another thing is that I think the viewfinder design is a little cluttered, especially considering the WiiU pad screen is small enough without the border and lines clogging up the screen. I also don't like the charging circle design, which is ridiculously petty, but its something I've come to look forward to from game to game
I have a few favourite ghosts so far, like the spiritual successor to woman in box, woman under box, headdress and the other ghost that comes out of the box with all the hair.