It's frustrating to the point it's funny with "Break" in DEN. I love when he gets so worked up he "break"s himself. Break United xxx taxi break Skywest break ummm break umm break.
At SFO you got the "Norkal" guy and the cute sounding controller that extends her A's.(turn on aaaaaalphaaaaaaaaa). Also there is a NorCal controller that sounds like Porky pig.
In IAD there was a tower controller late at night that rates your best "seeeeeya" before heading to departure.
I too did the lax tower tour and talked to the lady that did clearances (who was pretty cute with all the tatoos) and she laughed at all the pilots that asked who was the woman on the radio that sounded like an 12 year old on ground control. Sometimes your imagination is better than seeing what they really look like.