In living, it is normal that people always have thoughts on something. In fact, others' opinions are able to build our life up in any aspect, for instance, suggestions or advice given by our friends. However, some people argue that it is better to have friends who have the same personal thoughts as we do, and some of them argue that it is crucial to make friends with people who would always agree with our opinions. In this essay, I would like to elaborate on some advantages and disadvantages of both sides.