Any utils worth installing a GUI on a server for?

[Quartz]

Traditionally I have always run fileservers headless, with any 
administration being done through ssh. However, I'm currently working 
with a system that's somewhat overpowered for its job and I'm 
considering throwing a window manager on there just to have access to 
more stuff. Are there any utilities out there that require or really 
benefit from a window manager that are worth installing one for? The 
system's main function is a sort of NAS that can have usb drives plugged 
directly into it, so I'm only really interested in stuff that would 
relate to that: for example disk partitioning/repair programs or fancy 
shells for messing with samba/nfs/zfs, etc.

(Also: forgive me in advance if this is a stupid question. I'm not 
familiar with using freebsd in anything resembling a workstation role, 
so I'm not sure to what extent the GUI software selection differs from 
linux).