Preferences seem to be underestimated but one of their best features is the colors you use on states.
Right now it's minimal: the amount of custom colors is fixed and you cannot reorder them in the list, but it really makes your FSM easier to read in a flash, both in the full view and on the minimap.
Now, overall, I wish I knew of a way to export the Preferences of a given project to another one; conflicts would be solved by ignoring problematic options or offering the user to use old values or new/default ones. With no value defined for a given option, the current one would be used.
