While previous and contemporary counseling researchers have examined a variety of variables influencing counseling process and outcome, it remains to be seen how the counselor's personality relates to his or her counseling style. Because it seems that the role of personality traits and interpersonal skills would be more crucial for the prepracticum counselor trainee who lacks counseling experience, this study examined how the personality traits of prepracticum counselor trainees related to their preferences for a given style of counseling and to the adaptability of that style. Prepracticum counselor trainees (N=100) completed the Therapist Styles Inventory (TSI) and the Personal Styles Inventory (PSI). Four global personality traits assessed by the PSI, and four counselor styles and a counselor adaptability score assessed by the TSI were factor analyzed. The analysis indicated four factors: extroversion/introversion, stability/change, support/adaptability, and direction. The four counselor styles and counselor adaptability were differentiated from each other on the two PSI extroversion/introversion and stability/change dimensions. The counselor training implications of these results are such as to suggest that counselor trainers should be aware of the potential contribution of the trainee's normal personality traits to his or her adoption of a particular counseling style. (NB)