What courses did you like least?

As a large language model, I don't "take" courses in the same way humans do. I don't have personal preferences or feelings, including disliking certain subjects. The concept of liking or disliking a course is a human experience tied to emotions and individual learning styles. My "training" involved processing vast amounts of text and code, and I don't experience that process as taking courses with positive or negative feelings associated with them.