I'll throw all this under a spoiler just in case, so while I thought Abigail was a ok, fairly amusing film, it missed out on vamp greatness because...In what way?
So the set-up, a misfit band thrown together to abduct a girl for ransom is fine. But then they get to the house, just toss her into a room, and proceed to get drunk, not really explore the place, set up any security other than 1 guy kinda watching the driveway, and they are CLEARLY not great at this. So already I'm left wondering why these idiots are sticking around, it's the haunted house "GET OUT" lazy writing fallacy all over again. Then they panic, ok, a guy gets wacked, ok, but then the Abigail reveal is done so quickly, with almost no real build-up, it's not really played for horror or even a jump scare, just a beat of action. THEN it gets worse, the sniper guy is just wacked outta nowhere, they all scatter around the house, their half baked vamp fighting is handled so poorly it loses any real sense of threat. People can run away from Abigail with ease and she is so obsessed with her dancing it seems silly, not threatening or horrifying. But nor is it FUNNY, just silly. The big pool full of bodies was great, but you gotta wonder how or why it is there since that would be an odor you could smell from across the state.
Then we get to the vamp stuff and changing. Abigail has great movements and the teeth are cool, but her affect is off. She seems neither ancient and/or world weary, nor particualrly childlike. Is she like Kirsten Dunst and hating being trapped in a childs body? Is she fascinated with the modern world or totally cut off from it? At no point do the humans ever show any interest in her motivations, try to really deal with her, or ponder her nature. Granted, none of these criminals is a scientist or particularly educated, but they spend an entire scene with the medic chick showing how perceptive she is (aka expositional backstories for each character in a vain attempt to generate empathy for them) but it comes to NOTHING as she uses no science or anything. It's not "new meets old" or "logic versus faith" or any of that. Big burly dude goes down like a chump yet halter top medic chick can withstand being thrown into hardwood panelling a dozen times. No human death has any real visceral thrill to it compared to the EXPLOSION of gore the vamps, for unknown reasons, experience.
Then we get to the chaging. Blondie is bitten and can then be totally possessed, we never really get a sense of what the experience is like FOR HER. Terrifying? Seductive? Total mind wipe? Her teeth change with no agonizing scene (we do see glasses vomit up a lot of blood during his change at least), there is just no horror in it. And a simple flash of sunlight in a silver plate blows her up. Why? Garlic is useless, crosses are useless, but sunlight and stakes are instantly fatal? Why?
Glasses is turned and he seems to be in total control. He is aggressive but its hard to say if this is just him or some vamp property. We never get a transition, its just human and now full vamp. MUST he feed, or could he choose to be gentle about it? MUST he kill, or are all the vamps just homicidal jerks when they were human? Glasses is changed but kills his maker and nothing happens to him. Medic is changed (partially? and killing her 'maker' cures her. Why?) Glasses deals ENORMOUS damage to Abigail, drinking gallons of her blood, but it doesn't seem to do anything to him and very little to her. Is this a vamp property, an age thing, what? The vamp rules are so loose it's impossible to set any stakes, convey risk, or be excited for anything because every scene is unconnected to the scene before. She can fly, but not now. Abigail flops all over between being sadistically evil and innocently in danger. If she can control a bit human then why wouldn't she just do that to medic right away instead of appeal to her desire to see her son? Then glasses tries it, how or why does he think he is doing it? Can he feel the control? Is he just assuming he can based on the very quick interaction with blondie? Why didn't Giancarlo control him or at least sense he was about to get stabbed in the back?
Then daddy shows up and the film again makes a total tonal shift. Is Abigail a prisoner, a plaything, an enforcer, or a child? They try to make her all these things but never settle on a convincing version of any. Medic gets to go free but does she now have dangerous knowledge of vamps? What honor do vamps have to let her live? It all feels too pat of an ending or just a set up for her to be some sort of Van Helsing type character for more spin-offs.
Anyway, happy to discuss further, maybe in a new thread, but these are jsut my thoughts. The film is just a inconsistent but mostly fun little romp, but for reasons described above, it falls far short of the type of vamp tale -I- prefer (stuff like Lost Boys, Near Dark, and even Fright Night, all of which were borrowed from for Abigail, but do much better jobs exploring the aspects of vampires I personally enjoy).