I like being able to create custom categories for my trips; however, utility of this feature is limited by the fact that there is no way to move or sort the categories other than the order in which they were created. Drag and drop would be the most convenient method of re-ordering, but a fallback option would be to permit (though not require) categories to be sorted in alphabetical order -- it's easy enough to play with the names so they show up in the order I want.