As you noted in your original post, this bike is a bit on the heavy side. That is hardly noticeable while rolling, but you can expect that the bike may try to get away from you at slow speeds and even while standing still.
Expect to get a helmet, boots, gloves, jacket, and pants with at least minimal protection. All The Gear All The Time (ATGAT)
Expect to practice U-Turns and other low-speed maneuvers in parking lots. Or better yet, to go take a riding class. It will pay off.
Expect to invest in Frame Sliders & Luggage Guards. After a simple tip over while standing still, I bought a set from T-Rex Racing Inc. I had been thinking about them for a while and should have bought them sooner. I could have saved the cost of replacing a mirror and a side bag. Statistically, you are more likely to drop your bike standing still or barely moving than having any other incident. Don't roll the dice on this!
Expect that the FJR ain't no scooter.
Expect to give the FJR serious respect. If you give it respect, the FJR will give you love in ways you can't imagine until you experience the many amazing things the FJR can do.
With great power comes great responsibility.