Depends on your budget. For us, we can only afford to stay at the Poly if we get a garden view room. But...if we could afford it, we would probably get a MK view just for the heck of it. If money were not object, my ideal location at the Poly would be the MK view in the Hawaii longhouse.
Here is a little tip, which I got off of tikiman's website (I think you were given the link to it in your other thread). The Tokelau longhouse has some garden view rooms on the west side of the longhouse that not only can see the lagoon, but also have a sideways view of the castle. Of course there is no gaurentee that you will get what you request, but more often than not you will. Here is the link to my trip report when we stayed in the Tokelau longhouse...there are some pictures:
http://forums.wdwmagic.com/showthread.php?t=381970&highlight=happymom's
Everyone has their favorite longhouse, and each has pros and cons that are different for each family depending on your wants/needs. Here are the reasons that my family loves the Tokelau:
It has a central location....it is an easy walk to the Ceremonial house as well as the Transportaion and Ticket Center. It is very close to the laundry facilities (on our last trip we stayed on the other side of the resort, and it was a HUGE pain to be far away from the laundry!!! So you might want to consider this when choosing a longhouse if you plan on doing laundry, which I assume you will be since it is such a long trip). It is also close to the bus stop.
Another thing we loved is that when steping outside the north end of the longhouse, you are just steps away from Sunset Point and the beach.
Also, the rooms are larger in Tokelau. Not by much, but enough to make a a noticiable difference for our family. It is also one of the longhouses that was refurbished in recent years.
Another tip....when choosing your longhouse that you want to request, have a second choice in mind, and maybe even a third. On our last trip, we had decided we wanted to try Figi...it is another popular longhouse, and since we were not planning on going to Epcot we did not care about being close to the TTC. However, when we checked in, they were unable to put us in Fiji because it was full (even though we had requsted Figi when we made our reservation months beforehand). I was caught off gaurd, because I did not have a back up location chosen. I was put on the spot and had to make a quick choice, so I told them to put us in Aotearoa because it is right behind Fiji. Big mistake....we were not happy with the longhouse or our location in the longhouse. So from now on, I will have a second and maybe third choice picked out beforehand, just in case.
Sorry, you asked about views, and all I talked about are lonhouses! But I know you are looking for as many opinions about the Poly as you can get!