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.
TJ. He is always smiling whenever we see him, he's shown to be charismatic (Talking Luann's family into letting him move in with Brad and in their house when he accidentally lit it on fire, talking Brad's dad into okaying a car trip), and has been shown to concoct sometimes rude schemes to get money. However; his parents were never mentioned, and a 2008 strip very heavily implies that he suffers from Parental Abandonment. It's easy to interpret that he's a rare male example of a Stepford Smiler who has to resort to scams or unethical business practices to get by.
Designated Villain: Ever since Quill was introduced, Tiffany shifted from merely the shallow Veronica to Luann's Betty to an outright antagonist. Her behavior hasn't changed, but the other characters' reactions to it have.