If I followed all of the rules folks listed above, it would take me an hour+ to ride home every day from work.... I split cars, filter, ride through stop signs/reds, etc...
in some instances it makes sense to feel out your commute and act accordingly
I would agree with this, and it may be because we're both commuting in fairly dense (population) areas. I filter, I cross against lights, etc... but I do it cautiously (Idaho stops, and whatnot). If I lived in an area with fewer cars, faster flowing traffic, longer distances between lights, etc, etc I might feel differently.