Mind Reading
So one thing I actually like about Inheritance is that touching another's mind is seen as immoral. Eragon still does it absolutely all the time of course, but the narrative itself constantly depicts it as violating or at the very least belligerent. In Inheritance you can feel someone probing your mind and it's mad uncomfortable, to put it lightly. But even if someone could read your mind passively without intrusion, I think the idea of violation and intrusion would still be present, ethically speaking. Yet so often in fiction I see mind reading treated as a casual affair that doesn't really bother anyone but that one stoic guy. Eragon's contemporary Twilight is a prime example. Nobody has a problem with Edward constantly reading their thoughts without consent. I know if mind reading existed in real life I'd be massively paranoid about people reading my private thoughts (even though as a person I'm pretty open about how I think I feel for the most part). I could, however, also see the massive temptation to read minds if one had the power. And that's not something I've never seen examined. I've seen people refuse to read minds after being horrified to discover what people think or just plain being completely unable to control the ability, but I've never seen a character struggle with doing so because they believe they shouldn't, but doing so anyway because of the ridiculous number of advantages it would provide.