I am setting up a tripple boot HD and was going to use a 4th partition to share files between OS's. I was wondering if there is any point in having much space on each OS partition to store files or if I just make the shared partition big and put everything on that? Is there any difference in speed between accessing files on the shared partition vs the native files? Are there any other benefits/disadvantages of having files on either the native/shared partition?
OS's in question are Windows 7, Ubuntu 12.04, and OS X 10.7.4.