Motivation factors create a positive sense of job satisfaction and tend to arise from the nature of the work itself.  Work that;

• allows people to utilise and develop their skills in a challenging context
• recognises successful endeavour, and
• provides high levels of autonomy and responsibility
• is strongly associated with a positive sense of job satisfaction. 

Most of us would recognise this as a valid observation from our own experiences.  However, beware the trap of over-generalising with your employees.  Some are more comfortable in a structured and controlled environment in which personal and professional risk is low.