Temos a mania que somos complexos, mas depois é isto.

When it comes to user experience, are there things that people love that you didn't expect them to love?

Some of it is about tactility. Think about the number of times you have stood in the lobby of a building and watched a little kid run up to an elevator button and then just push it a hundred times. (...) Or the traffic-light button. There's a tactile response that human beings obviously really like.

- Genevieve Bell, via The Atlantic