Re: What was Data doing before the D?
Weren't Holodecks relatively new by the time the E-D was launched. If that's so then previous crews he worked with may not have had the experience in interacting with artificial people much less such a real honest to goodness android. That could have kept him isolated, physically and emotionally. His commanding officers may have had him, like Guinan said later in season two, "doing the dirty work." Once holodecks became commonplace, it might have become easier for people to interact with him.
Imogene, get serious! Who do you think you're talking to?! I've known you for 27 years, and all I can say is, if God was giving out sexually transmitted diseases to people as a punishment for sinning, then you would be at the free clinic all the time! And so would the rest of us!