I prefer Nexenta's feel. But a 4tb limit on the free option doesn't work for me and I had lots of issues with it's stupid cut down command line when you ssh in.
Nexenta is no-charge (non-commercial) for up to 18 TB of data (actual data on disk, not raw storage). You also get a normal bash shell by logging in as admin (instead of root) and using sudo.
My biggest complaint is getting used to ZFS ACLs when sharing to Windows systems, which I guess I'd have on any ZFS system.