The first time I tried to have users fill out a form, what I did was that I sent them an exe file which contained a windows application that showed a form and saved the replies to a file. In the email I asked users to send me back that file. But no matter how I worded the email, 50% of users sent me back the exe file instead.
That problem was what triggered me to learn about server side code and databases.
And when that worked, it hit me: I could make a form that asked users about their favorite bands and suggest them new bands right away. This way the system would learn about all the bands of the world on its own and become better and better in suggesting music. This is how Gnoosic [1] was born. Later I adapted it for movies and called that Gnovies [2]. And for literature and called that Gnooks [3].
All 3 are still alive and keep learning every day: