For example, some jobs require a person to apply physical effort, work with animals, take large risks, cut into human flesh, deal with very ill people, carry out numerical calculations, handle abstract ideas, or make decisions about the life or death of others. Irrespective of the nature of those job in terms of the “vitamins” reviewed in chapters 4 to 8, between-job variations are present with respect to core tasks of this kind. And for each core task, people differ in their preferences. The same core task makes some people unhappy and makes other people happy; in a minority of cases, an individual’s apparently for taste.” (This contrast between preferences is particularly obvious with respect to hobby activities, where between-person differences can be very substantial.) Variations in personal salience of this focused kind (judgment J4C) undoubtedly influence subjective well-being, over and above any impacts from the primary environmental features and the rated salience of those (J4B).