http://www.ted.com/talks/amos_winter_the_cheap_all_terrain_wheelchair.html
This reminds me of something my older brother was fond of saying. "All engineering should be directed towards pampering the end user as much as possible." Yes, he was a bit of a snob when it came to the products he purchased and rarely settled for second best in anything. However, I think that drive in him made him an awesome engineer and moved him to only produce his best and expect that from those around him. I ask you to think about the items you rely on every day. Do you think they were designed with you in mind? If not, what drove the design process? Are there any that could be better engineered for the end user (you)?