Something lets me believe that when Roy founded TW along with others, they thought of setting the precedent by being creative and forward thinking. We have rules, but they aren't meant to bog you down and I have generally observed that the freedom to perform to the best of your ability is valued more than sticking to a plan or following rules.
TW pleases me because there's always someone thats helping you tap your unused creativity in the workplace. I enjoy having colleagues who are motivated by "doing a good job". And if TW is special its because it tries to keep processes light instead of creating bureaucratic structures that stop you from fuly actualizing yourself. As always, I believe in the present and I cant guarantee this is what I'd feel in 5 years time, but for the present moment TW makes me feel very special for all the things it does to make me work better.