The only thing as iconic about BlackBerry as the keyboard is the flashing red light. Simultaneously the most wonderful and frustrating part of the phone. It's like Hal from 2001: A Space Odyssey, helping you stay productive while controlling your life. It lets you know you have messages without opening the phone, how useful. It reminds you there are always emails without opening the phone, how horrible. You're like Gatsby watching the light as it flashes on and on. It keeps you on your toes.
(Also you can change the colours and that's pretty rad).