Nicely done. Selective colorizing is a time proven technique, as you may know, and was done in the past physically with a brush. The way you are doing it here reminds me of that old technique. Carry on, am sure your work will only get better.

Nope. Selective colour just doesn't work for me. Especially the photos with the oranges and the one with the guy with the green glasses are way off. Too saturated colours, the selective colouring just for the sake of it and distracting from the more interesting parts like the faces or poses of the people.