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.
Alternate Character Interpretation: All over the place, both in-universe and out. Specifically, the show involves a mystery where no one knows whom to trust. A few characters who seemed trustworthy turned out to be traitors; a few characters who seemed like traitors turned out to be trustworthy; other characters flip-flop between the two. The motivations of most characters remain unclear, as do the extends of someone's involvement in their particular conspiracy- if they actually are involved. Many people have lied about their identities and personal histories for a number of different reasons; other people have been lied too and don't really understand what's going on. And we're only scratching the surface of either conspiracy.
Award Snub: Tatiana Maslany was criminally overlooked by the 2013 Primetime Emmys. Not even a nomination!
Fridge Brilliance: When Leekie says that Cosima could end up on the cover of Scientific American she replies that they don't put scientists on the cover. Leekie covers, but it's obvious he was referring to her as an experiment, not a scientist. He knows she's one of his clones.
When looking through Beth's purse, Sarah finds two phones, a black one and a pink one. The only people that call her on the pink phone are Cosima and Alison, who both have pink phones of their own.
Why is Helena wearing Sarah's shirt in the finale? Because she stole it when she broke into Beth's apartment.
Fridge Horror: Aynesley wasn't Alison's monitor. She really was trying to be Alison's friend and Alison alienated her and allowed her to die for no good reason. As bad as Alison took it when she thought Aynesley wasThe Mole, how bad will it be when she learns the truth?
Les Yay: Alison and Beth could come off to having this by Alison's reaction about her throughout the series. Upon hearing about her suicide, she all but brandishes a knife towards Sarah who informs her on the situation. She also says she admired Beth and they shared gun lessons. For someone who she claims to have barely knew, Alison takes Beth's suicide extremely hard and can come off as someone who just lost a romantic partner in her actions.
Paranoia Fuel: Where to begin? The notion that you are not completely unique? The idea that some company has a patent on your DNA? Being hunted and not knowing why? Spending every day in a state of existential crisis? Nearly everyone in the world has been told once that they look like someone else...this show takes that and runs WILD with it. Enjoy thinking on that next time someone says you look a lot like a friend of theirs...
Its extremely unsettling how far-reaching the neolutionists are. And the whole concept of monitors-your friends, family, and/or lover might be spying on you. Imagine a group of scientists capable of watching your every move, performing tests on you in your sleep, or taking away your child because someone you trust is working for them.
Scare Chord: Helena's leitmotif makes heavy use of these to exceptional effect.
Sarah- Unable to be with her daughter whom she loves.
Watching her real birth mother die after a lifetime of wondering what she was like.
Alison - Just wants to be normal, is unable to cope with her life being a science experiment and her husband who she really does love is actually her monitor. Now she has to live with guilt of letting her friend die.
Cosima - Feels heart broken finding out Delphine search through her things and revealed to Leekie she was in contact with the others and has now developed an Incurable Cough of Death.
Beth- In relationship with someone she loved but did not love her, worse yet he was only with her to watch over her for someone's science experiment.
Helena- Abused all her life, both physically and mentally to the point of being turned into a serial killer. She has never been shown any true affection or love and is eventually killed by one of the few people she ever felt a connection to - her twin sister.