For reasons that lie in the dim dark recesses of ancient history, I always partition my hard drives. Drive C is the Windows operating system, and any other operating system stuff that either Windows insists must be there, or that I want there for security.
Everything else - pictures (E), documents (F), spreadsheets(G), music(H), etc goes on its specific drive. Those drives are shared over the network, some with no restriction (so visiting daughter can troff away at Dad's latest downloads and stuff) and some (my confidential documents) password protected.
That works a treat. C is never shared.