Alonzo is a very laid-back kind of guy. He knows how to work hard, but is not so competitive at work that he butts heads with his colleagues. He likes to relax, takes life "as it comes," and generally experiences low levels of stress. Alonzo can be described as having a personality:

Type B                                                            

Explanation:

Type B personality: In psychology, "Type B personality" is described as one of the different personality types in which an individual tends to show "lower stress-levels". An individual with Type B personality enjoys achievement, works steadily, and possesses a high propensity of disregarding mental and physical stress if he or she is not capable of achieving something, often considered as more tolerant as compared to an individual who holds Type A personality, docile and flexible, open to different social relations, empathetic, calm, assertive, etc.

In the question above, Alonzo can be described as having a type B personality.