To Plan Or Not To Plan?

I am a planner: I love figuring out the logistics of a trip that I'm going on months before I even set foot on the airplane that's flying me to my destination. In a lot of ways, I feel like this is a gift, because by planning things out I can often find the best travel deals, places of interest that I would not necessarily know about without planning first, and just in general I learn more about the place that I am visiting through planning for my trip.
However, there is a downside to this aspect of myself as well. There is something to be said for simply booking a flight to a faraway destination, and knowing absolutely nothing about where you are going. I feel like this way of traveling somehow makes you feel more ingrained in the culture and general flow of a place. You're no longer a tourist simply visiting and snapping pictures of the most famous sites; you need to rely on communication with people and locals around you to learn about the best places to go visit. In other words, you are more like one of the locals when you don't plan a trip somewhere.
But again, planning does have its positives as well, and I think that even a little bit of planning is a wise idea before going on any trip, if nothing else than for your own personal safety. So let me know, do you enjoy planning out your trips in detail, or letting life lead you to new and exciting ventures? Let me know!