I would never recommend partitioning your drive. Keep it as a one big drive. Some people like to partition their drive so that they can put their data on separate "Drives” (music on E:, backup on G: etc etc). I do the same, with plain folders on one "drive". Although if you want to format the drive, you can only format the whole thing now, and not just the partition giving you the problems.
The only place where I can see partitioning being useful is when one drive is being used on multiple platforms, e.g. Windows, Mac and Linux. Maybe there are some other advantages of partitioning that I’m not aware of.