Duty- I was born to serve, it is the honour of my life to serve my king/god/country until my dying day

Revenge- The orcs/evil cult/ foreign country slaughtered everyone I loved. Every night I hear the screams of those I loved in my dreams, I will always hear them until I drown them out with the screams of those who killed them

Vanity- Anybody can kill but only I look so great doing it. When I ride forth maidens swoon and strong men tremble