I am hopeful that at minimum we can create guidelines for selecting questions.

I also think that some standardized health & safety questions by product category would be good (for nutritional supplements I would personally be interested in seeing data for nausea, diarrhea, weight change, stress/mood, and changes in sleep quality).

For productivity solutions I'd be curious about effects on social relationships, and other changes in relaxation activities.

Within a given product category, I'm also hopeful we can reuse a lot of questions. Soylent's test and Mealsquares' test shouldn't require significantly different questions.