I liked your third shot, the B&W one! Enjoy the new 6D! One of the things that REALLY makes the third shot look good is called "heel lift". Both subjects are in the actual process of walking, but you managed to capture them at the instant in which both of them have a heel off the ground; that in itself is one of the secrets to making walking people look like they are walking in a still photograph--capturing "heel lift". Take note of it from here on out, and you'll see that even 1/10th or 2/10 of a second earlier and their representation would have made them looked flat-footed, still, and awkward.