Show HN: A machine learning Rails app to predict your favorite color

I'm nearing completion of the machine learning class offered online by Stanford (Prof. Andrew Ng is awesome).

I wanted to try out some of the concepts I learned so I made up this little Rails app. I doubt if you can actually predict someone's favorite color based on a few preference, but we'll see how it looks after a few (thousand?) examples. I'm still working on it, but it's in a working state and I'm collecting all the data I want, so I can always rehash it later to tweak the algo.

Any suggestions for a more interesting set of data to form predictions on?

http://colorsvm.herokuapp.com/

https://github.com/zacstewart/colorsvm