Choosing the next path

It's now the final year of my Master program but it's also the time to ask myself this question: Should I continue for a PhD?

I have tried working as an intern at Intel for 2 months. Although job as an intern is a bit different from the real job as a software engineers, I think I have the same opinions towards both. I feel that I don't really like the kind of job that requires sitting in front of computers. not that I hate programming. In fact, I even start to like programming but my eyes feel so tired all the time when I keep staring at the screen.

Last night, I saw the "wordings" on my little board when I was sitting on my desk. It may look silly for some but it said "I want to be a good teacher!". I remember writing it down a few years back when I was so tiring of studying abroad alone. Have things changed? Why don't I want to be a good teacher anymore? I think the expectation that others has on me has started to make me confuse about what I want to be. You may think that the answer to the question "What is your plan for future" will become clearer as time goes by. However, if you were to ask me the same question a few years ago, I am sure that I could give a more definite answer. Maybe one thing I learn from Graduate School is that graduate students become more confused of their future.

What I want to be?