I guess GTD sucks for creative types. The type that thinks that their needs are so special compared to other workers, are very sensitive towards whatever environmental factor makes them <i>feel bad</i> or <i>discouraged</i>, that any kind of externally imposed structure cramps their style, and that they should have the freedom to make up whatever ritual that makes their god-given creative juices flowing. Which are, again, very sensitive to petty environmental distractions.