Our baby twins are currently 15 mos. old. We took them to Disney when they were 7 mos. and 1 year old. At 7 mos. we stayed at AKL. While we loved the resort, only having the bus transportation option was very tedious and inconvenient. Therefore, at one year old, we stayed at CR and it made our trip 100% better. Not having to fold up our stroller because of the monorail made all the difference in the world. And the ability to walk to MK was a fantastic option. It took about 10 minutes to walk there.
So I guess what I would recommend is that you choose a resort that is conveniently located to the park(s) you will frequent the most often. If MK, then you have CR, Poly, GF, and even WL to choose from. You can take a boat from WL to MK. If your family will frequent EPCOT and MGM the most often, then look at an EPCOT resort or Swan/Dolphin. Just my opinion. We view location of the resort as the most important factor.
Good luck!