Depends what you're looking for. If you stay in an 'official' Disney hotel you get to go in certain parks early on certain days and stay later in the evenings.
Get a book called The Unofficial Guide to WDW, it's a brilliant book full of just about everything. It even has room sizes and layouts for the WDW resorts.
WDW hotels are expensive, you get little tiny Disney toiletries but apart from that you could be in any hotel. The pools tend to be great, many with waterslides.
I would recommend either getting a hotel that offers suites so you get more room or a house. The newest resort just opening is Windsor Hills. As well as having your own pool there is also a community pool, toddler pool, tennis and basketball courts, cinema (free) and a play area. If you get sick of your own company you can go to the community pool.
If you are going soon, try Windsor Palms as it is already up and running and runs with the same amenities. They are both off Marker 5 on the 192 in Kissimmee.