It was just not knowing how long the form was... it felt like it was a choose your own adventure where my answered dictated what the next question was (which was obviously not the case, just the feeling I had).

I think something like a (1/10, 2/10, etc...) in front or behind the question would have been helpful. Then you at least know how many more questions there are.

Congrats on the launch -- first contact with potential customers must have a lot of little things like this.