this is how to become a 'night-ops expert' :

[avadream]

answer the 16 questions like this:
6-4-4-2 2-4-3-3 2-1-1-3 2-4-3-1

your personality as seen on the 3rd day imp-results will be:
normal-loner

[Kouga]

Alternatively, another nice result is Night ops / Martial Arts. For this, you only need to answer one question differently:
6-4-4-2 2-4-3-3- 2-1-1-1 2-4-3-1

Personality will remain the same. For better understanding of the impacts of the different answers, see http://web.textfiles.com/ezines/EUROHACKER/ISSUE1/a09.html.

Edit: Like Night ops, Martial Arts gives a reduced sleeping time and increased aim, besides some amazing melee power. Melee attacks are cheap, and three melee attacks in a row knocks the opponent out.