Aside from not giving me back my change, if there's one other thing I don't like when taking a cab ride it's sleepy drivers.
I'm glad the cab ride to work is only about 10 minutes or else I wouldn't be typing this now. The cab driver would suddenly swerve from one side to another or step on the brakes even when there were no other vehicles around. I looked at the rearview mirror and his eyes were closed! Forgodsakes! If he wanted to commit suicide, I didn't want to be included in his plans. I would have gladly stepped out of the car.
So, aside from NOT drinking and driving please don't drive when feeling sleepy. If alone, look for a safe place to park, lock the doors and snooze for a while before continuing to drive. Don't put your life and other people's lives at risk.