Question! Would playing as a humanesque robot be a possibility? In terms of practicality, It'd probably be treated like Data on Star Trek by calculating probability, withstanding inhospitable environments, doing ambiguous sci-fi scans, and doing other neat robot-y stuff. As for psychological drama, it could be taken in a lot of ways. One crewmember could insist the robot is an emotionless machine, they could ponder what it means to be human, the ethics of considering a robotic crewmember expendable could be questioned, etc.