Conclusion

Successful foreign language learners have a lot of individual characteristics.Many factors can influence a language learner.Compare the belief with research findings，I find that some common senses in describing the characteristics of a successful learner are good and acceptable，such as personality（extroverted or introverted，anxiety）.But some ideas to intelligence are too subjective.Although learning styles and age of acquisitions still have no exactly research findings，some ideas shared by the interviewees are reasonable and acceptable.