The personality traits of stand-up comedians, and owners of vicious dogs

They don't quite fit the stereotype:

Stand-up comedians are a vocational group with unique characteristics:
unlike most other entertainers with high creative abilities, they both
invent and perform their own work, and audience feedback (laughter or
derision) is instantaneous. In this study, the Big Five personality
traits (NEOFFI-R) of 31 professional stand-up comedians were compared
to those of nine amateur comedians, 10 humor writers and 400 college
students. All four groups showed similar neuroticism levels.
Professional stand-up comedians were similar to amateur stand-up
comedians in most respects. However, compared to college students,
professional and amateur stand-up comedians on average showed
significantly higher openness, and lower conscientiousness,
extraversion, and agreeableness. Compared to stand-up comedians, comedy
writers showed higher openness, conscientiousness, extraversion, and
agreeableness. These results challenge the stereotype of comedians as
neurotic extraverts, and suggest a discrepancy between their stage
persona and their true personality traits.

Findings revealed vicious dog owners reported significantly more
criminal behaviors than other dog owners. Vicious dog owners were
higher in sensation seeking and primary psychopathy. Study results
suggest that vicious dog ownership may be a simple marker of broader
social deviance.