Briefly, tell the interviewer about the situation and the task that you faced. Describe the action you took and the result. Give a specific example that relates directly to the job you are interviewing for. To keep it brief, you must choose your words wisely.
"I am looking for a company where I not only enjoy what I am doing but I can also grow into new positions."
Even if it's true, do not mention salary, hours, or commute as the primary reasons you want the job. Those reasons will not impress an employer with your fit for their job. You may make the interviewer feel that you are just in it for the benefits and will bail as soon as another opportunity comes along.
Tell the interviewer how your skills match the position you are interviewing for, how you fit into the culture and express your enthusiasm for the job.