OMG what an incredible episode! Hated it years ago, love it now. The symbolism is so powerful. I guess it's because the range of characters seen within Data encompass most of our emotions that watching felt so satisfying - at least that's my theory. I assume it gets so much hate because it's not typical (or, 'hard') science fiction. Awesome use of lighting as well. TNG was well scripted, for sure 
