Core77

Pure Contemporary has a whole bunch of interviews with different designers available online.

Here's a snippet from Niels Diffrient's interview:

Is it a major drive for you to have products that are accessible to average people?

Absolutely. Value and cost are paramount features of my design. I'm not designing as a prima donna. I consider myself a very commercial product designer. If something doesn't sell, I'm just as disappointed as if it were ugly. It's part of the package. I work with corporations that support my work, and I want them to earn a good income from what I've designed. That's where the challenge lies. It's not the act of the artist who doesn't care beyond the need to satisfy the artistic urge.