Usability is not everything. If usability engineers designed a nightclub, it would be clean, quiet, brightly lit, with lots of places to sit down, plenty of bartenders, menus written in 18-point sans-serif, and easy-to-find bathrooms. But nobody would be there. They would all be down the street at Coyote Ugly pouring beer on each other.
Joel SpolskyIf you can't understand the spec for a new technology, don't worry: nobody else will understand it either, and the technology won't be that important.
Joel SpolskyA user interface is well-designed when the program behaves exactly how the user thought it would.
Joel SpolskySoftware development takes immense intellectual effort. Even the best programmers can rarely sustain that level of effort for more than a few hours a day. Beyond that, they need to rest their brains a bit, which is why they always seem to be surfing the Internet or playing games when you barge in on them.
Joel Spolsky