This study analyzed the self-introductions of participants in a smoking and vaping cessation program to understand their motivations, barriers, and support needs. Through thematic analysis of 787 participant introductions, six main themes were identified: Motivations for Quitting, Previous Attempts to Quit, Barriers to Quitting, Desired Support, Usage Patterns, and Identity. Health concerns emerged as the most common motivation for quitting, while psychological and social challenges were the primary barriers. The study found no significant correlation between the length of introductions and participant engagement or satisfaction, suggesting that while introductions provide valuable qualitative insights, they do not relate to other factors. The findings describe the contents of introductions to human coaches, although the direct impact on outcomes requires further exploration. Future research should employ a controlled design to evaluate the effectiveness of detailed participant introductions in enhancing eHealth support and consider the complexity of dual usage in smoking and vaping cessation efforts.