Pro
Art deco
Industrial
Abstract
Surreal
Cinematic feel
Lines
Blur
Double exposures
Natural light
The magic hour (the colors and long shadows)
B/W
Slide
Cross processing slide
Fast lenses
Bokeh
Good metadata (e.g. I shot this photo using Pan-F 35mm, box ASA, 1/60, f 1.4, Xtol 1+1, etc...)

Con
The flash
Cookie cutter shots (e.g., a family portrait where all are wearing the same thing or similar and the smiles looked forced/tired or are saying the dreaded 'cheese')