I had this in my collection from way back in my Isaac Asimov phase, but for some reason never read it. It's the basis of the movie Bicentennial Man, starring the late Robin Williams, so it was very hard not to hear the robot speak in Robin's voice.
It was a fun story, but the only note I have in my notebook about it (since I'm writing this review 4 months late) was a really profound statement, given the general attitudes of Asimov:
Andrew thought that it was strange that humans would choose the day of coming forth from the womb as the significant thing to commemorate. He knew something of human biology, and it seemed to him that it would be much more important to focus on the moment of the actual creation of the organism, when the sperm cell entered the ovum and the process of cell division began. Surely that was the real point of origin of any person!