When it comes to antonyms for the phrase "were the habit of," there are several options to choose from. On the one hand, a person could break the habit of doing a particular action, indicating the discontinuation of the activity. Conversely, one could establish a new habit, representing the opposite of not doing anything. Another potential antonym could be "were not accustomed to," suggesting unfamiliarity or discomfort with a particular behavior. Overall, the antonyms for "were the habit of" depend on the context and particular usage of the phrase, but generally imply the cessation, alteration, or unfamiliarity of a habitual action.