Recruiter.com dove into the heaping research on both sides of the argument to find out if coffee-drinkers are, in fact, more incline to have Type-A personalities.
“Consider what is perhaps the most obvious conjecture: that heavy coffee-drinking is somehow related to ‘Type-A’ personalities—variously described as competitive, aggressive, clock-chasing, impatient, bad-tempered, ambitious, workaholic go-getters. In terms of popular stereotypes and iconic images of time-pressed young professionals juggling a coffee while racing back to the office or to a high-powered meeting, it would make sense that coffee is their high-octane gasoline.”
What Recruiter.com found, however, was pretty inconclusive. Although one study suggests a connection between Type A personalities and caffeine consumption, there’s also plenty of anecdotal evidence to suggest otherwise. (How many aggressive people do you know who abstain coffee? Probably quite a few.)