This study explores how university students' perceptions of their classes and instructor personality contribute to the overall rating of the class. The study also investigates whether the students rate Japanese instructors and native English speaking instructors differently. Data were collected using a questionnaire comprised of instructional rating and teacher personality rating sections. The study employed statistical analysis including multivariate analysis of variance, principal components analysis and regression analysis. The results of the study revealed that students' perceptions of the class as interesting, organized and clear; and positively influenced the overall rating of the class. Meanwhile, students' perceptions of their instructor revealed as aggressive, dominant, anxious, and authoritarian; and negatively affected the overall rating. The findings indicated that when it comes to Japanese instructors, personality traits such as sociable, ambitious, intellectually curious, intelligent, and gentle influenced students' overall ratings. Adapted from the source document