Another factor in Spock not going for Leila six years earlier is that he was already spoken for. While "This Side of Paradise" is a first season episode, and "Amok Time" is a second season show, in stardate order, "This Side of Paradise" is the very next adventure after "Amok Time." So, with his "less than a marriage, more than a betrothal" situation with T'Pring out of the way, he no doubt feels more open to such dalliances. Plus he gets a chance to get that rest of the pesky pon farr hormone out of his system...
--Alex
Then why did Spock get involved with her in the first place? Knowing that he was betrothed, he should have told her beforehand.
Hmm.... Good question. Of course the real reason is that the writers had not yet thought up "Amok Time" when "The Paradise Syndrome" was made. And the stardate relationship was purely accidental. But in-universe? It's been a while since I saw "The Paradise Syndrome" but my impression had always been that Leila was super into Spock but he never actually went for it... like the whole Nurse Chapel angle. And now that he's under the influence of the spores, he can have the relationship with her that he wanted to but never did. Maybe I got that wrong... now I want to rewatch the episode.
UPDATE--- I just rewatched the episode. Pretty good one! But, yeah, I am 100% sure that six years earlier, Leila told Spock she loved him, but he made no reply to her. She says several times in the episode that Spock didn't show her any feelings at all. Leila's feelings were unrequited until the spores changed Spock's temperament. They probably had a working professional relationship and she developed feelings for him but he shut her down, even though, as the episode implies, he may have been more interested than he let on, but he felt obligated to reject her. The "Amok Time" angle is just a fun coincidence since it falls on stardate 3372.7 and "This Side of Paradise" is on stardate 3417.3. And since I prefer my Star Trek in stardate continuity, it just works out well that way and provides another layer to the character's possible motivations. But I would reinforce that the writer's of the show had no such connection in mind when they made them.
Btw, I'm totally fine with people naming their favourites. What's everyone's opinion of TNG and ENT? Last year I watched a few episodes of TNG but found the characters to be very bland. It's the only series I'm not too sure about watching.
Regarding these two shows, I would agree that the characters in TNG are mostly pretty bland, but not always. Picard and Data and eventually Worf actually get a whole lot of development. And what it lacks in character chemistry, it makes up for in excellent stories. Especially in Seasons 3 - 5. For me, that's where TNG shines. Season 1 gets a lot of crap, and deservedly so, but it has some highlights. And Season two gets a lot of hate, but I think it's less deserved. "The Measure of a Man" is, I think, one of Trek's all around best shows, and it's from S2. I feel the quality of seasons 6 and 7 slid down hill until the finale, which was pretty good.
As for Enterprise... It has it's moments. There are a few episodes I genuinely enjoyed, like "Shuttlepod One" and the one where they find the Old West people. The show has some fun fanwank to try to appeal to TOS fans here and there, especially in S4 (which seems to actually be mostly this). But over all, the show feels like forgettable wallpaper to me. But don't write it off, just from my opinion, it certainly has it's fans. And I'm a big fan of Doug Drexler's art direction, which is mostly what I'm looking at when I watch it.
I will say that if you do watch Enterprise and really enjoy it, then drink a lot of booze before settling in for the finale show. It was a pretty terrible send-off and the show deserved better. And I'm saying that as a person who didn't really like the show that much.
--Alex
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