For as long as I've used it, SUSE has welcomed me as I logged in with a message to "Have a lot of fun". The message is kind of pointless, but its easy to change. It is stored in /etc/motd (message of the day). On shared systems, I use it to post important system updates, like kernel and library updates that might break other's code.
On my own systems, I've found it to be useful to use cron to replace the message with important system stats like the amount of free hard disk space, current usage levels, CPU temperatures, etc.