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.
YMMV: Defying Gravity
Alternative Character Interpretation: The series seems to expect us to root for Zoe/Donner. But witness just how often she tells him to back off and he continues to push into her space and intervene in her life as if he has a right to. While sleeping with someone else, even!
Crosses the Line Twice: Zoe's Halloween costume, after her hysterectomy, is what she would "never become": a pregnant astronaut
Fridge Brilliance: Why do we have FTL communication in an otherwise fairly hard Sci-Fi show? The Alpha and Beta objects when they're first detected communicate using some sort of FTL radio, their communication is picked up by radio telescope scientist types, and there's clearly no communication lag. From studying the communication and the Beta object FTL telecomms is born.
Romantic Plot Tumor: The show spends tons of time on how Donner and Zoe had sex, she got pregnant, didn't continue the relationship, but now are stuck in space together for six years! Cue drama!
Unfortunate Implications: The planned ending for the series would have had the objects create an alternate "perfect" reality, in which the various characters wouldn't have made certain key decisions in their past, leading to a new reality where Zoe worked in mission control and was raising Donner's child, instead of having an abortion and becoming an astronaut. Needless to say, no matter where one falls on the issue of abortion, having an entire reality declared invalid because she chose to put her astronaut career over motherhood, seems a little... extreme?!