My husband and I have slightly differing views. He doesn't like the buses (loves the monorail, boats, etc though) and I don't mind them much with the exception of the end of the day leaving the parks.
We went by ourselves in 2012 and stayed at the swan, so we rented a car. We actually didn't like this much. We just really like the freedom of being driven everywhere (except DTD - black hole for buses!- learned that years ago).
Last year we took our toddler and booked at the swan again, then cancelled it and moved it to the boardwalk inn. This was our best and most relaxing trip in a long time. We were happy to not have to mess with the car seat in a rental, we loved checking our bags on the way home at the resort, and our toddler thought the buses and monorail were fun! We did not go to DTD though.