A hearty thanks to all of you who offered your thoughts and observations for my Fun Factor project. I'm thrilled by the response and most grateful for your help. You are fab.
I'm working on an easy-to-read document that compiles all the responses I've received, which I hope to finish later today. When it's ready, I'll post it here for review and feedback. It will undoubtedly contain some holes, but as a first swing at building a 'catalog of fun' for video games, it's pretty illuminating.
In the meantime, please feel free to continue offering suggestions for entries. I realize the comments section gets a little unwieldy when it grows past a single page, but I read every one and include each citation in the catalog. If you don't have time to plow through all the comments, no worries. Post your response, and I'll sort through any duplicated entries.
Thanks again for your help. More soon!