I have never heard nor seen that such could be personalized, but I am not used to retail and its features.
Just saw a note about a launchpad which looks like it could go in this direction.
I assume you have already compared user parameters?
What happens if you logon to SAP on User A's PC using your user ID? (or user A on your PC)
If that would change the behavior then I would assume it has something to do with local settings (which I actually do not really believe it could have any effect)