Mr Marks, thanks for asking.
I used LR4 for all post processing work on these images. I have not tweaked the default presets much, in stead I apply global and local adjustments to fit the individual image to my taste.
Exposure slider - here I make sure that the histogram is pushed to the right without introducing clipping of course.
Highlights and shadow sliders - I prefer to modify the lightest and darkest parts of the image using these sliders, and usually do not touch the Tone Curve. Sometimes I will also use the Black slider, and then only to bring up the darks. But my go-to adjustments for overall visual impact are the Clarity and Vibrance sliders. I will apply anywhere in a range between +10 to +50, seasoned to taste. I will ususally not toch the Saturation slider. I think the dominant colors in the scene which are affected by saturation the most, becomes too intense, even with after adding Vibrance.
I also apply sharpening, noise reduction and Post crop vignetting to taste.
I find the Graduated filter to be extremely useful tool to balance the exposure, and will pull this out to darken a sky or a foreground.
I use the Adjustment Brush for working on faces/skin/eyes to make the central subject in the image pop. Here I will increase the exposure and clarity on faces as if I had used a fill flash.
This tool has taken a bit of practice to use successfully though, but I find that it can bring you that little extra impact and help draw the attention towards the main subject.
I should mention that this is my workflow for working on the kind of images shown here, i.e. people and street images, where I find that a healthy amount of RAW tweaking is generally desired