Here's a tenative list of questions for those who are interested in recording themselves:
Pixel art in general:What makes pixel art unique?
What is the role of restrictions in art?
What is pixel art? (Alternate: How would you define pixel art?)
How does pixel art compare to other media you've used?
How would you describe pixel art to people outside the community?
Your own art:When did you learn about pixel art? What got you interested?
How would you describe the art you make?
Why do you pixel?
What influences your art?
How do you make your art? (talk about process)
text questions up-front are important because this is a tricky subject to explain and it would serve noone (unless that's the angle you're going for) to have people struggle with definitions and such 'on the air'. If the point is to explain pixel art to the layman, careful, pre-written answers to precise questions is the way to go.
The live interviewing process isn't critical, I just think it helps to establish a conversational tone. I acknowledge that this is more effective if the person is already an expert on their subject though, with clear ideas about everything already in mind and able to speak easily about it. The other thing is that I would almost definately require more than one interview to get a good recording and I don't want to take too much of anyone's time. I might need people to record themselves anyway since I'm having problems getting my recording software working.
If you want me - I'm in! Though, I'm not a native English speaker either. If I had the text written down so I could practise beforehand, I would probably do better.
I really liked your idea with the portraits and lip-synch. That is such a cool idea. And I agree - it would really add character to the documentary. It also reminds me of Creature Comforts (from the creator of Wallace and Gromit).
I'm perfectly having non-native English speakers for this, any variety of voices is good! Agreed on Creature Comforts, its the seminal example of lip-synching to pre-recorded voices.