Cmy thought out of the three, since your from the world. PPH is like POR, with conceirrge. You get a nice room, but nothing special, although let me rephrase that a bit since we are comparing dlh, you get a very large room but nothing all that special in amenities. Plus the conceirrge is very basic and scaled back IMHO, and opens and closes early. DLH, well you get the original, the most Disney feel, large rooms with lots of space, I think about the same size as PPH. I would compare it to say the wilderness lodge, not in architectural but in if you compare WDW hotels., conceirrge is a step up from PPH. The views are a lot better. The rooms seem a lot darker and mistreious to me, the ones at PPH are bright and airy feel. The pool is much nicer. I have had much better service at dlh than at PPH. The walk to me seems closer, although people say no, and I do know it depends on where your room is. When ever we have stayed at pph, something has been broken down and to our advantage usually, once it was the pool so we got to use dlr pool, once it was laundry not so cool to have to walk it to dlr, but I got free coffee while doing it, once it was the parking lot so we got free valet parking. Then you have the grand, that in WDW terms is like gf. But unlike WDW were the more you pay the bigger the room, at dlr the more you pay the smaller the room. Personally, the views are not so great, we can not due to ptsd stay DTD view so I can not say how that is, but we have stayed, court yard and theme park and pool view. Court yard was not all that thrilling, might as well have been standard. Theme park, we saw nothing but six foot trees, blocking any and all views of the theme park, and pool view, we saw a sliver of a pool but that was it from the angle we had. So if you stay there don't, pay for a view. Concierge is the best here. But you pay the most.
Now that all said, my favorite is the grand, I love the lobby and we have almost always got it for just pennies over dlh. I think last year the price was $100 for 6 nights total difference. I like it for the theme park right there. Second would be PPH, I like the large open airy feeling. Yet, if my kids were going I would not go to PPH, other than airy rooms the amenities suck. My least favorite is dlh, but really that is only because of the difference in rooms, if your stuck way out in one building you go forever. I hear although never happened to us, that you can get a building that is not concierge and then it is a pain in the butt to get to. If you do go this way, get the building near the hat, it is our favorite and houses conceirrge.
Hope that helps. And it is only imho, others may totally disagree.