Dennis always feels like he is running out of time. he rarely takes a vacation and finds it hard to relax at home. he demands perfection of himself and is competitive in all arenas of his life. dennis can be described best as having a(n):

Dennis can be described best as having a "Type A personality".

Type A and Type B personality theory depicts two differentiating identity composes. In this hypothesis, identities that are more focused, exceedingly composed, eager, fretful, exceptionally mindful of time administration and additionally forceful are marked Type A, while more casual identities are named Type B. 

Yes, they are always very triggered