Most of the traits may seem small and tedious. The fact is that sushi preparation is made up of hundreds of small and (what may seem) tedious daily routines. One can easily skip those routines if one wants to. What makes the difference at the end of the day is one's willpower to hold on to his discipline to do all those small steps. Ultimately, it is an accumulation of those daily routines that will make a good sushi chef into a great one.
Depends on the culture. In this answer I will focus on modern French, modern European, and one of a number of American "passes". How and when food is served in which order is as much a function of the season as it is the chef's idea of what to serve when and the diner's decision how to have it presented.