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: Safe Havens
Ensemble Darkhorse: Samantha used to be a supporting character, but she turned out more interesting than Matt.
Mary Sue: Ming used to come dangerously close to this with her various talents.
Samantha is fully in Mary Sue country (Omni Disciplinary Scientist, high-level athlete, professional-class drummer), but, like Ming, is likeable enough that her talents don't add up to unlikeablity.