Alternative Universe where Boothby is El-Aurian, because I think him and Guinan would be such good friends!, and I love the idea of him growing and cultivating the campus grounds from seed, while giving advise to generations of officers!

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Alternative Universe where Boothby is El-Aurian, because I think him and Guinan would be such good friends!, and I love the idea of him growing and cultivating the campus grounds from seed, while giving advise to generations of officers!
Star Trek Fan Theory:
I firmly believe that the El-Aurians were once of the same species the the Q.
For whatever reason, the El Aurians chose to renounce their immortality, and chose to no longer use their powers. Or maybe the surrendered them as they left. (Like the Amish or Mennonites rejecting English culture.)
Regardless of how it came to pass, it is canon that the El-Aurians and the Q had a war or similar event, something that could hardly be possible -unless!- they could be a match for the Q. This split probably happened millions (billions?) of years ago. We know Guinan is more than half a millennia old; we also know from canon that her parents are alive and well. It’s not unreasonable to assume a 4,000+ lifespan for El-Aurians. Possibly much longer.
It is canon that El-Aurians can manipulate the appearance of their age, and that they are sensitive to space-time disruptions. They also come in a wide variety of shapes, sizes, and skin tones.
I don’t believe they are the hypothesized ‘founders,’ progenitors for the humanoid races of the Alpha Quadrant.
There is no evidence that El-Aurians can interbreed with other races. I don’t personally think they could. I headcanon that they have a 4-strand DNA helix that makes them utterly incompatible with the 2-strand, 48 chromosome genetics of humans, vulcans, klingons, romulans, etc.
I think the Q known from TNG and Guinan have a history that goes back to the schism, or on Guinan’s side at least, very close to it. Maybe her grandparents were members of the Q Continuum.
It is canon that she’s met many Q entities, and describes some as “almost respectable.”
I say “schism,” rather than “civil war,” because I don’t think the El-Aurian split caused a war; not exactly. Maybe individual battles here and there, sect against sect, family member against family member. I think the El-Aurian Schism caused a lot of hostility between the Listeners (El-Aurian), and the Wielders (Continuum). — Think the strife between parents and their adult children when one says “screw tradition! I’m going to go be a [hippy, artist, etc],” when the parents insisted the child become a doctor or lawyer.
El-Aurians will always have extrasensory ability to sense Q entities, and vice versa. They might’ve lost their powers in the traditional sense, but I believe them more than capable of using a Q’s own force against it. — Think martial arts: it’s not about being the most bad-ass, it’s about directing your opponent’s force back at them.
Q is scared of Guinan because he knows he can’t hurt her. She can’t hurt him offensively, but were he to try -anything!- at her she’s pivot the force and basically send it right back at Q kung-fu style.
He couldn’t teleport her out of the ship and into deep space. (He could destroy the ship with her in it, but that’s not his motivation.) He probably introduced the Borg to her group because it was a way to attempt to eliminate her / the group of El-Aurians she was running with.
Why does he have a particular dislike towards her / her family group? Well, who knows. Maybe they were cousins, or maybe he was there when the Schism happened. Maybe before Guinan or her group left, they did some harm to Q, or to his pride. Maybe he vouched for them, and felt betrayed when they left.
Personally, I think whatever harm she did to him was against his ego, not physical.
Anyhow that’s just my theory; but I’m sticking with it until disproven.
Whoopi Goldberg as Guinan.
El Aurian: I have used as the source some El Aurian [Guinan's people] lettering on Dr. Soran's rocket controls in the movie StarTrek: Generations®. El Aurian seems to have two types of writing - one looks a bit like scribbles, the second like it has been turned into geometric non-flowing printing for computers. I put both into one font - minors (a-n) for the scribble, and capitals (A-Y) for the geometric. The El Aurian number system seems to be quintal [0 to 4]. For example: 10 quint = 5 decimal, 133 quint = 73 decimal. [I think] El Aurians seem to prefer downward writing of lettering and numbers, not left to right. However, for technical reasons I had to fit the characters in sideways. When you print it out or put it into a graphic, make sure you rotate it a 1/4 turn.
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El-Aurian Redesign
Originally from the Beta Quadrant, El-Aurians are a borderline humanoid race. They are eight limbed, with two main walking limbs, and they often use at least two other limbs during locomotion, though it's not always necessary. They are extremely long-lived, often upwards of two thousand years.
El-Aurians have groups of cerata on their necks and their tail. Each ceras contains a central tube connected to three small highly vascularized lung-structures. A small pouch at the base expands to lower pressure inside the ceras and draw in air. Relatively simple organs, cerata regenerate easily when damaged. The constant inhalation/exhalation from the cerata causes them to wave gently. Non El-Aurians often find this effect calming, but others may think it unnerving.
El-Aurian listening skills are a racial personality trait, not biological, and their hearing is not exceptional among known races. Even before their homeworld's assimilation, they were a widely-travelled species, and their cultural value of knowledge and history contributes to their listening skills. They have fantastic memories, and easily assume historian roles. Their arms contain partially separate nervous systems and do not require the concentration of the main brain to operate--this leaves the main brain freer for other functions, including the storage of memories (because El-Aurians have a lot). It also makes El-Aurians great multi-taskers.
Their fan functions similarly to the antennae-plate on the Trill, though it is not a hearing organ--that is located dorsally to the fan. The fan has receptors for a broad range of particles, including chronitons, making El-Aurians a rare time-sensitive race. Their biological ability to detect spacial and temporal anomalies is unparalleled in known species. As they have a limited skeleton and much of their body is supported by hydrostatics, they are also sensitive to pressure changes (and they like less gravity than Fed Standard--Guinan keeps Ten Forward a little light, it's fun)
El-Aurians have at least two distinct phenotypes---given their rarity, we don't know whether or not there are more.
(yay for the chickensquids)