I'm with the leave it in gear club depending on the situation. I ALWAYS lane split to the front of traffic. Sitting behind a row of cars waiting for an ...... to take you out is retarded.
If you live in a place that's not dangerous to ride, count your blessings.
My bias is 20 years of California with high population density from every corner of the world and none of them predictable. I got hit 3 times there.
I saw a rider get rear-ended by a drunk in a Suburban at 10:AM right next to me in San Francisco. Rider was stopped at a light in an empty lane, she hit him square going around 40MPH, didn't touch the brakes until across the intersection. He flew - I don't know - 20 yards landed like a pile of rags; bike evaporated. Lived. Won his law suit after a year of hospitals.
Since then, I move in front of the first car. I can't erase that lesson.
One more thing I love about Europe, roundabouts!