I voted organized. Permenant benefit of reduced civic cost as you all know.
But the double speed courthouses and lighthouses are clutch. Because you often need these in conqured and coastal cities, which don't start out producing much. I used to think Industrious was better because forges help you create everything else that you might need. But around the time you have 6+ cities you need those courthouses fast. They prevent your economy from crashing faster than marketplaces.
And then, centuries later, factories double speed - just amazing. I used to save a GP or two just to have a golden age when it was time to industrialize my Civ, but no need with organized.
Organized is multi-faceted. I thought it was the worst when I first started playing just because it seemed random and incohesive.
But honestly I think all the traits are good. Some are more fun than others. Protective isn't very fun but when you play with it, you notice it, and it's clutch.
I think expansive is under-rated on this thread. My cities all get

after factories and expansive just helps so much for those 100 years post industrialism pre medicine. Mehmed as the ottomons, with his traits and UB is great for this time period.
I think aggresive is over-rated. It's not bad, but it's not great. In the single player game techs are much more important than promotions.
Imperialist is kind of weak, but on a crowded continent it can be a great way to box in a neihbor.
I defenetly understand the case as financial being the best though.