Hawk,
Yes,that's it.The -300 tail surface wasn't large enough to prevent adverse yaw on a turn or with a xwind.
Mind you,that made the -300 a pilot's airplane as it is the only airplane I remember which behaved like a glider and demanded some fairly aggressive rudder pedal input for a coordinated maneuvre.In this respect,flying it was quite rewarding in terms of professional pride.
I bet that's the main reason you liked it so much,Flight detent!