[gentoo-user] {OT} rdiff-backup: push or pull?

[Grant]

I'm setting up an automated rdiff-backup system and I'm stuck between
pushing the backups to the backup server, and pulling the backups to
the backup server.  If I push, I have to allow read/write access of my
backups via SSH keys.  If I pull, I have to enable root logins on each
system to be backed-up, allow root read access of each system via SSH
keys, and I have to deal with openvpn or ssh -R so my laptop can back
up from behind foreign routers.  The conventional wisdom online seems
to indicate pulling is better, but pushing seems like it might be
better to me.  Do you push or pull?

- Grant