Unresolved Plot Points on "Star Trek :The Next Generation"
I was a huge fan of Star Trek TNG when it first came out. Like many people today, I've seen every episode several times. As far as I can tell, there are a few points that the writers took up and then seem to have dropped before they were fully resolved.
The first and most minor one is Picard's history with Boothby, Starfleet's trusty gardener. We know that when he was at the Academy, little Jean-Luc got into trouble. He played some sort of prank on (or that affected) Boothby, and boy, did he get into trouble. What he did was so terrible that the Academy officials were ready to expel him. If Boothby hadn't stepped in at the last minute on his behalf, Picard would today be cleaning toilets on Bolarus IX. After that the two struck up a lifetime friendship. But what did Picard do? Was it so horrible they couldn't say it on television?
Everything else has to do with Guinan. First of all, what exactly is her relationship to Picard. More than once she has referred to the great bond they share. I may not have this quite right, but once she said something to the effect that the bond was stronger than that of lovers or of family. Later she told Wesley that she only met Picard when she came aboard the Enterprise (in the second season). When Picard travels back in time to 1893, he meets a younger version of her who does not know who he is. So what is this bond, and how did it originate?
Also, during the first encounter between Guinan and Q in the series, Q knows her, tells Picard that she is not what she seems to be, and offers to eliminate her. Guinan also clearly recognizes Q, and she takes up what is clearly an offensive (not defensive) stance against him. So apparently she has some hidden power sufficient for Q to consider her a threat. Other than the fact that she can perceive disturbances in the timeline, what are her powers, and how did they arise? Presumably such abilities are not inherent to her race, since her people were gobbled up by the Borg. Guinan was an intriguing and mysterious character that the writers simply abandoned.
I'm fairly certain none of these questions was answered in the series. What I'm wondering is if they were ever tackled in a canonical Star Trek novel or comic. Or at the very least did a writer for the series ever shed light on any of them in an interview?