Why are you leaving your company?

I am always trying to understand why people leaving their job, although they got good salary and in a good company.

Here I collect some reason for people leaving previous company:

I found myself bored with the work and looking for more challenges. I am an excellent employee and I didn't want my unhappiness to have any impact on the job I was doing for my employer.
There isn't room for growth with my current employer and I'm ready to move on to a new challenge.
I'm looking for a bigger challenge and to grow my career and I couldn't job hunt part time while working. It didn't seem ethical to use my former employer's time.
I've decided that is not the direction I want to go in my career and my current employer has no opportunities in the direction I'd like to head.
After several years in my last position, I'm looking for an company where I can contribute and grow in a team-oriented environment.
I am interested in a new challenge and an opportunity to use my technical skills and experience in a different capacity than I have in the past.
I recently received my degree and I want to utilize my educational background in my next position.
I am interested in a job with more responsibility, and I am very ready for a new challenge.
I left my last position in order to spend more time with my family. Circumstances have changed and I'm more than ready for full-time employment again.
I am seeking a position with a stable company with room for growth and opportunity for advancement.
I was commuting to the city and spending a significant amount of time each day on travel. I would prefer to be closer to home.
To be honest, I wasn't considering a move, but, I saw this job posting and was intrigued by the position and the company. It sounds like an exciting opportunity and an ideal match with my qualifications.
This position seemed like an excellent match for my skills and experience and I am not able to fully utilize them in my present job.
The company was cutting back and, unfortunately, my job was one of those eliminated.

Didn't be cared, like he didn't been put at a important position, or just like a dust man in the project. Didn't feel he is important. Didn't get the agreement from boss or leader. Didn't feel they have enough room for growth. Didn't feel a team belonging feeling. Didn't increase salary for a long time.