OK, so obviously I know little to nothing about fashion and posing for pics. What do you mean by a "small break"? I am guessing it means the hem should come to just above where it touches the shoe?
Also, the chinos (Levi's M&C) came with the cuff sewn into the hem, should I keep it or not?
Hem needs to come slightly below where it would naturally meet the shoes so that there's a small amount of excess length that creases, but not so much that it 'puddles'.
Whether you keep the cuff or not is personal preference. I'm not a fan of sewn in cuffs.