So, you're in the mood to be criticized, are you?
Well...you look funny! And your wife dresses you oddly! lol!
As far as these photos go, I'd echo the idea of going all-color, or all-B&W and eliminating any selective color toning. SHe's an attractive, tall, slender woman, so that's always a plus for photography. My comment though is that such large sunglasses serve to hide her from the camera's eye...sunglasses in every image is a bad look...sunglasses for style is one thing, but sunglasses in every photo is just not a good look; it is almost a form of disguise, and it's unappealing.
My second issue would be photographing in areas like this urban marketplace zone, with open shaded areas where there is not much nearby light from the sky; that type of lighting is rather flat, dull lighting, which reveals no shape, no form, no depth. Lighting that has no real direction is often rather dull. Photos 1 and 3 are pretty good examples of directionless, dull lighting. When photos shot under that type of lighting condition are translated to B&W, they will often be rather dull' notice how much more visually exciting the shots made with stronger lighting are?
One of the BEST types of lighting is found very close to this shaded lighting. Just a few feet away, where the SKY's light comes close to the shadowed, overhanging areas, there is beautiful light that has some direction! In areas where the subject is in open shade, and where there is a large expanse of SKY-LIGHT (not light from the sun, but light from the sky!) there will be lovely lighting. Not underneath the overhangs of buildings, as in shot #1, but at the edges of the shaded areas, where the large expanse of the sky will create a nice, big catchlight in the eyes, or on the sunglasses.