Ed,
Was flying out of Long Beach which is Class B airspace. Very busy airport with 5 runways shared with the big boys as well as the military in the C17s!
Frequent flights during training into other busy Class B as well as transits in the VFR corridor over LAX, San Diego, etc plus the odd couple of jollys out to places such as Palm Springs.
The radio prepares you for anything as it is VERY busy with you sometimes feelng that clearances arent so much given to you as hurled at you
The weather is also very changable on the West Coast and not all blue skies.
J.