In Val McDermid's "Northanger Abbey," Cat exhibits a deep enthusiasm for atmospheric architecture, reflecting her appreciation for the beauty and intricacy of structures that create a certain mood or ambiance. This passion is not merely an interest in buildings but symbolizes her desire for experiences that elicit strong emotional responses, revealing her artistic inclinations.

However, Cat's love for architecture is rivaled only by her feelings for Henry, indicating that her romantic connection is of utmost importance. This dynamic showcases the balance between her artistic passions and personal relationships, suggesting that while she admires the external world, her heart ultimately lies with Henry, highlighting the interplay between love and personal interests in her life.