I enjoy so many different aspects of teaching:  interacting with students & seeing them interact with each other, preparing lessons and predicting what questions will come up, seeing a student ‘getting it,’ the period when a timid student finally begins to lose some inhibitions and trust her/himself.  Of course the real sense of achievement comes with the positive feedback - hearing from a student, “Hey, it worked!  They understood me!”  Here are a few of my favorites stories: