I'd give your project a shot but the signup funnel for your beta is a little funny -- you should let people choose to leave the textbox-based questions blank and still get an invite.

If you just made those parts drop-downs with the most popular answers and had an 'Other' option that makes a text-field option, you would probably get much more valuable data and more of it. I would not be surprised if you had some amount of dropoff in your beta signup funnel due to questions that make potential users feel like theyre being 'put on the spot'