Ah the joys of commuting ...
Not speaking of your close shave Sean but I think you also have to make your own luck. After a few years you get a feel for where the danger can come from and what are the safety margins you should be surrounding yourself with. Of course there will always be the unexpected. Like Tamar I do tend to ride agressively and I think it's good in a way as it increases your awareness and self-protection instinct - but I do surprise myself at the profanities I can expell at careless drivers/riders sometimes though
I found a new little game this week ... have had a couple days when I wanted to give my legs some rest and been commuting much slower than usually. You find yourself ambling gently alongside the middle end of the commuter spectrum, then comes a hill or a traffic light still green a few tens of meters and braaaaaaap can't control yourself and open the gas for a few seconds, then ease up and carry on at a gentle pace