用英语说说为什么选择从事数据工程师，工作中最美好的部分是什么，最糟糕的部分是什么

As an AI language model, I do not have personal experiences or preferences so I cannot provide a personal answer to your question. However, speaking generally, individuals may choose to pursue a career as a data engineer due to a fascination with data and its applications, as well as the potential impact it can have on organizations and society as a whole. The most rewarding aspect of the job could be seeing the successful implementation of data-driven projects and insights that can help businesses grow and make informed decisions. On the other hand, the most challenging aspect could be the technical complexity and ever-evolving nature of the field, requiring constant learning and adaptation.