BBW regarding post #52, the way you have processed these I probably prefer the B&W, but processed differently I would prefer colour. For the colour version I would tone down the contrast dramatically - while this works well for the B&W I think it's too much for colour.
While B&W could be enhanced to bring out the structure and texture of the brickwork (as Nic suggests) in colour I would tone these down so they primarily function to draw you in to the main subject of the picture - hubby and daughter. You could desaturate a little and turn down the clarity/structure/mid-tone contrast. I would also lighten the very dark areas on their clothing, especially on your daughter, and darken - a little - the brickwork and the flag behind them. Right now I think it is too dominant. Finally, I think I would experiment with the blues - pay around with the saturation and luminance.
Peter on your first image in post #53 I'm leaning towards the B&W but I can't tell you why. I think it had to do with the unfamiliarity of the orange and blue theme of the landscape/seascape. On the second one, I'm with the others on the colour version. I don;t think there's enough tonal variety in the B&W version to make it work as well.
On the image in #62 I'm with BB on preferring the colour version. The colour combinations of the heavy inky blue sky and background sea, the greenish hue of the foreground water and the reddish/pink hue of the water on the left are nicely demarcated by the structure of the seawalls. It's a nice effect and I think the overall slightly unnatural look works best in colour.