Some people you can come to know well even after only a few experiences together, because they have such and open and life-loving nature. David was one of those - you came to instantly like him on meeting and the feeling only grew as you got to know him better.
As evidenced in the post above where he commented just yesterday 'Tomorrow promises to be a beautiful day. Its the next day of the rest of your life,' it is apparent that David relished life and sought to live it to its fullest - also evidenced in his desire to ride a bike to work vs. being insulated from the world inside a motor vehicle.
I have no doubt the driver was oblivious to the world outside of his vehicle for whatever reason. Clearly he was not in tune with life in the way that David was. Ironically, the driver is the one who more likely losing the most of life every day. I expect that David lived his life and relished it. Certainly, 'obliviousness' was not one of David's characteristics - a shame someone else's cost us all his life.
I am grateful for the blessing of David's life and regret the pain that his family is now suffering.