Photoshop layers are powerful tools, but some of you folks need to stop going overboard with that stuff. Much like the previous fad of HDR/tone-map everything (so glad that's over), utilizing layers to heavily manipulate an image is proliferating like crazy - especially in Internet automotive photography. Those shots end up looking more like purely digital creations rather than captures off an actual camera.
I'm not against using layers entirely; they're lovely tools, after all. I just think a photographer should use layers in the correct manner. (There was a proper method of implementing the HDR technique, too, but that was largely ignored.)
For me, photographs are best made using a camera body with a quality sensor, excellent glass in front of it, and just slight corrections in post. It's all got to look realistic. Leave the abstract colorations and fantastical representations to instagram.