Jane,
Your preference is in agreement with a great many online instructors. While there is some research to support the position that larger classes indicate no significant reduction in student satisfaction or mastery of outcomes, there is also research that indicates a detriment to educational quality in larger classes over 20 students. There is still a great deal of research to be accomplished before more conclusive "best class sizes for online classes" standards can be set. Thank you for sharing your helpful insights.
Dr. S. David Vaillancourt