From the bastion of all things TOTALLY AND COMPLETELY TRUE AND RESEARCHED*, Wikipedia:
"Type A individuals can be described as impatient, excessively
time-conscious, insecure about their status, highly competitive, hostile and
aggressive, and incapable of relaxation.
They are often high achieving workaholics who multitask, drive
themselves with deadlines, and are unhappy about the smallest of delays.
of these characteristics, Type A individuals are often described as
junkies." Type B individuals, in contrast, are described as patient,
and easy-going. There is also a Type AB mixed profile for
people who cannot be clearly categorized."
Riiight. I'm pretty sure that most people would fall into that Type AB category, really. Anyway, I'm definitely not a Type A.