It's the little things that annoy the most...
High Expect,
I don't know why, really, but this little matter really winds people up. Perhaps more serious is the difference between waiting until aligned with the runway centreline before making the call (normal in civvy aviation) and making the call turning from downwind onto base 'leg'. I believe the argument surrounds the nature of the circuit flown by some military pilots.
'When in Rome...'
Cheers,
TheOddOne