Red Eye (film)/YMMV

Abduction Is Love:

Rippner: When we get out of this, I may have to steal you.

Alas, Poor Villain
Alternate Character Interpretation/Base Breaker: Rippner, mainly because of his Draco in Leather Pants/Mr. Fanservice status (and the fact that he has no back story and his actions can easily be interpreted in various ways). Some fans consider Rippner a misunderstood Anti-Villain who was just doing his job and had genuine feelings for Lisa, but others think of him as a Psycho for Hire who would have probably raped her if he had the chance (either because he lusted after Lisa or for sabotaging his plans in the end). Then there are some who even think Rippner was a cold-hearted and ruthless assassin who never cared an ounce about Lisa and was only using Lisa's past against her and mess with her mind. Finally, there are even some fans who wanted Rippner to succeed in the end simply because they liked him more and thought Lisa was boring.
Attempted Rape: Several fans speculate whether this would have happened or not during the lavatory scene or during their final confrontation (where both times had instances of Rippner pinning Lisa), had both times not have been interrupted (by Rippner discovering Lisa's scar in the former, and by Lisa calling Rippner "pathetic" in the latter).
Cringe Comedy/Dead Baby Comedy: To some, Rippner's teasing jokes with Lisa before he reveals his true nature could be considered this. He was probably trying to be charming in an pleasantly awkward fashion (while perhaps letting a few things slip as an inside joke to himself), but one would think casually telling a Self-Made Orphan comment and that he's involved with assassinations and terrorism would normally earn a few people to double take on it instead of not taking it seriously.
Draco in Leather Pants
Ending Fatigue: Several viewers did not like the third part of the film because it mimicked the typical Knife Nut villain often seen in Wes Craven films, while others did not like the ending at the hotel because they found it unnecessary and odd that it ended with Lisa returning to the hotel right after a threatening ordeal like nothing happened and without getting questioned by the police.
Evil Is Sexy: Unfortunately leading to Draco in Leather Pants. Good Sweet Lord in Heaven does it ever.
Fan-Preferred Couple: Lisa and Rippner, in spite of (or because of?) all the attempted murder on both sides, as well as the intense chemistry between Rachel McAdams and Cillian Murphy, especially during the lavatory scene.
Foe Yay Shipping
Freudian Excuse: Several fans believe Rippner must have had some sort of abusive childhood to end up the way he is. The fact that he is not shown to have a sympathetic back story to have his actions fall back is only another reason why fans so divided on the character.
Harsher in Hindsight: "Wait, did someone break your heart?" Lisa was raped.
Idiot Plot: Some people feel this way about the plot, or rather, the assassination plot.
If I Can't Have You: The final confrontation gave a bit of this vibe.
Jerkass Dissonance
Jerkass Woobie: Rippner to a small extent, but that might just be the Draco in Leather Pants/Mr. Fanservice talking...
Mind Game Ship: Rippner's and Lisa's "relationship" is practically built on this, the film revolving around the psychological mind play between them.
Misaimed Fandom: The main cause of it being Draco in Leather Pants and Foe Yay Shipping. See Alternate Character Interpretation.
Moral Event Horizon: Rippner more than likely crossed it a long time ago as this seemingly is not the first time he has been a part of assassination and terrorism plots, and he mentions the Keefe assassination is his last job, but viewers are divided between which of his actions shown were worse--strangling Lisa in the lavatory, knowing that Keefe's family will get killed in the assassination and willingly allowing it to happen, or trying to kill Lisa in the end of the film.
Mondegreen: A common misinterpretation in the Fandom is Rippner's line in the lavatory. He says, "I never lied to you, Leese." However, many mistakenly hear it as, "I never liked you, Leese," and some fans even use it to support their "theory" that Rippner did not have real feelings for Lisa.
Narm: For those who found Rippner getting pissed over a sea breeze just a little humorous.
Paranoia Fuel: It is a very subverted romantic comedy. Things get creepy. Wes Craven played on the paranoia of flight: the isolation, Claustrophobia, the feeling of being trapped, and sitting next to a complete stranger, not knowing who they are or what kind of person they are.
Signature Scene: Red Eye has two--the lavatory scene and when Lisa stabs Rippner in the neck with a pen.
Unintentionally Sympathetic
What an Idiot!:
- Lisa running in heels. Though, it's justified, given there is a Psycho for Hire chasing after her.
- Rippner unprofessionally following Lisa to her house, an unfamiliar environment where he would be at a disadvantage. Sure, he was not thinking straight because 1) he is pissed because 2) he just got stabbed in the windpipe with a pen, but one would think he would act more professionally and slip away into the shadows instead of letting his emotions get the better of him.
The Woobie: Lisa.