I use one partition here on any system, too. These days it makes no sense. Even on a windows system I only need around 30GB to store all applications I need.
Data is stored on network attached storage, so I can simply maintain them and access them from any system I want without transfering the data.
Especially when dealing with flash and with classic hardware, a single partition is a must, as each additional partition eats memory and wasts disc space.
At the end one partition is filled, while the other is mostly empty and the mess begins. Better create one partition, create a data drawer and place it on workbench. Same accessability as with multiple partitions, but you will never ran out of space until the harddrive is filled completley.
Geit