These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
And Virginia's cover of a certain Queen song ("We will, we will, shear you...").
From the soundtrack, the track "These Are Dark Days" is pretty awesome overall, but the start of the track (which was never used in the miniseries itself) is particularly amazing:  (from about 2:21 to 3:40). It was used by SkyOne, the British channel which aired the miniseries in conjunction with NBC, in a rather cool 60 second promo seen here.
Also, the rather epic ending to the track "The 4 Who Saved the 9 Kingdoms", also unused in the miniseries (and also used by SkyOne, in their "Making Of" featurette):  (1:51 to 2:34).
Ear Worm: The Trolls have Saturday Night Fever stuck in their heads the whole movie.
Evil Is Cool: Both the Queen and the Huntsman are extraordinarily awesome.
Evil Is Sexy: Wolf, at least in the sense that for much of the miniseries he is technically a bad guy, or at least his allegiance is unclear.
Freud Was Right: Wolf's tail. The scene in the beanstalk forest, where he practically dares Virginia to touch it, she asks why he keeps it hidden, and especially the positively orgasmic look on his face when she brushes against the fur rather than with it, is extremely Freudian in nature. In a bizarre twist, however, the size of his tail apparently changes due to the time of the month, suggesting a connection to the female menstrual cycle. (Werewolves, after all, are tied to the typically feminine moon...) The fact it is hanging out of his pants following his 'hide-and-seek' in the forest with Virginia near Wendell's castle, and that this lets Tony disapprovingly know what they were up to, doesn't help.
Harsher in Hindsight: Blink and you'll miss it, but in the title sequence there's a shot of the Twin Towers collapsing in a cloud of magic.
Jerkass Woobie: The Evil Queen, aka: Virginia's mother. Yes, she tried to drown her seven-year-old daughter, but Tony implies that she was mentally ill and she was so horrified by what happened that she became The Evil Queen to escape from what she did, which made her easy prey for the original Wicked Stepmother.
To an extent, Sally Peep. Yes, she was a total Spoiled Brat, but when you come from a family that wins everything, how did you expect her to turn out? Being murdered by her own grandfather was pretty shocking.
Narm/Narm Charm: "We Will Shear You" starts out as the first thanks to Virginia's nervousness and inexperience, but by the second rendition (complete with Queen's original instrumentation as backing) it becomes pretty awesome.
One-Scene Wonder: Snow White. Not only was the casting for the role quite a coup (basically saying yes, overweight people can be heroes and icons too), one of the most memorable things about the series, and an aspect played up to an extreme degree in the previews and promotional material, but Camryn Manheim turns in a genuinely moving and absorbing performance that, in a reflection of her character's role in the story, provides much-needed heart and focus to both the floundering Virginia and the uncertain plot.
Squick: At one point, the Queen tells Fake!Wendell if he follows her instructions, he can "have any bitch in town". Punny, but her implication is that he can and will sleep with a female dog.
Tastes Like Diabetes: Largely avoided, which is an exceptional feat for a 10-hour miniseries about fairy tales. But in certain places, the sappiness factor was cranked Up to Eleven. See also: Hearts and butterflies swarming through the air in Kissing Town under a pink, heart-shaped moon. Insulin, STAT. Add in the literal Love Is in the Air, most exemplified by the massive pink heart which appears over Wolf and Virginia's head as they share their first kiss, and the little Cupid girl skipping through the streets dispensing fortunes, and... yeah. Then there's the singing ring... Sort of Played for Laughs, mind.
Of course, this trope seems to be the entire point of Kissing Town.
Tear Jerker: The death of the Queen. Also, some of Virginia's speeches about her mother.
Visual Effects of Awesome: The opening intro, when New York slowly transforms into a fantasy kingdom, is quite gorgeous. Sure the CGI is conspicuous and outdated, but if you ignore that, you can see why the opening sequence won awards.
What an Idiot: Tony's incredible Genre Blindness when it comes to the magic wishing bean. His first wish, maybe, could be excused if for some reason he didn't know about the Literal Genie trope, but once he learned Murray and his family would be indulging in Literal Ass Kissing, surely he would have known better than to ask for a "neverending" supply of beer or something that would clean "everything"—not to mention that last wish was absolutely redundant since he already had the Murrays to clean for him. And after these experiences he certainly should have known better than to ask for money without specifying its source, or ask to get free of the police car without specifying "safely" (or also asking to be freed of his cuffs!). By the time the last wish rolls around where he even manages to screw up the one useful wish out of the bunch by asking for the ability to hear Wendell only for himself instead of saying "we", he seems pretty hopeless.
The Troll King's children are also blatant drug users, seen in one scene preparing to roll and smoke "dwarf moss" (after one of them asking the others if they had any "magic mushrooms"); one of them comments that the last time she took it, she "saw fairies" for three days.
The miniseries as a whole has quite a bit of darkness, which a parent might not expect, unless they were familiar with the original Grimm's fairy tales.
Jerkass Woobie: Prince. Sure, he starts out a Royal Brat, but being turned into a dog and having your entire life stolen from you is pretty terrible. Not to mention getting turned into gold at one point...