I have an 80Gb partition and have it partitioned just because i likehaving the OS on one drive (and must have programs), and the rest for data, games, mp3, college work, and other programs and apps. I do this purely to help myself organise where everything is on the hard drive. The C: drive is rarely altered after the inital install of the OS and must have apps (namely Office). The D: partiton is constantly having data added and deleted.
I could use one partition but i choose not too, i just like having things set out like this. It may not work for you, but thats up to you
However you set it up, work out a good system for ordering everything on your computer and stick to it, then you will never go wrong.
