The PPH's view of California Adventure is great, depending on where the room is situated -- there is no getting around that (I have been blessed with free room upgrades on several occasions and the view was amazing each time, but definitely better on some occasions) -- and it's great to take advantage of if you want to watch some of World of Color from the room, or just stare out at the people walking around in DCA. I also love the bright, sunny feeling of the PPH and the cute sea/beach/surf-themed décor. The onsite character meal -- Surf's Up with Mickey -- is the only meal where Mickey appears, and it is the favorite character meal of many people. But the hotel itself is very basic and just not as expansive and large as the other two Disney hotels. That's the main issue for the PPH -- the theme is fine, but it's just not a large hotel.
If this is truly going to be your only trip to Disneyland, I think you should go with the DLH. As it has already been mentioned in this thread, it has more of a resort feel and a lot of classic Disney touches, along with character topiaries, cute teacup chairs in the lobby, some retro memorabilia, all kinds of Mickey icons everywhere, a small "geyser" and waterfall, Goofy's Kitchen, special headboards in the room, etc. The DLH used to have even more shops and restaurants -- and a bigger waterfall, as well as a whole marina -- once upon a time, and I actually preferred that version to the current version. But I think the DLH is really the quintessential Disneyland Resort hotel for families who want that classic Disney feel. That is not to say that the other two hotels -- PPH and GCH -- are not Disney in their own way, but the vibe and theme is different at each one, and not necessarily classic Disney in the traditional sense.