I'll be honest, I hated au ra when they first came out. While I didn't care that we didn't get viera, I hated that the reason was that they'd be too similar to miqo'te but what we got were still just hyur with animal parts. I wanted them closer to the concept art or at least females that were as intimidating looking as the males. When they finally grew on me and I made one, I turned on as many of the additional scales as I could and gave her slightly weird colors because I wanted her to not look human.
Despite all that I still tend to go for lore accuracy myself. The fewer headcanons in an RP the easier it is for everyone to be on the same page. That doesn't mean I'm against them though. I've encountered the au ra/miqo'te have enhanced hearing headcanon and, despite being aware of the MCKF quote that's already been posted, I'm perfectly fine with it. Something like that is fun and interesting to me as long as it's not abused to let your character hear anything and everything they want.
The ones I can't stand, however, are the sensitive scales and prehensile tails headcanons. In the case of the former, I'm pretty sure that's not how scales work. I think the closest thing we humans have is our fingernails. The nerves are under them not in them so how can they be sensitive? I imagine all they can really feel is temperatures intense enough to be felt through them and the pressure from them being touched. Furthermore, it reminds me of that terrible anime trope where catgirls have sensitive tails and they're so sensitive that touching them arouses them. It just reeks of ERP to me for that reason.
The latter is also a that's not how it works situation. I've had cats for half of my life and their tails just aren't flexible enough. I do believe tails kind of act as a sort of extra half limb though. I think, for example, an au ra or miqo'te might hit someone with their tail to get their attention if their hands were occupied. In the case of my au ra, she'll swing her tail like a metronome or tap the end of it to the beat of music instead of tapping her foot.
Also, not a headcanon but I cannot for the life of me figure out au ra horns! Not the hearing or any of that but how the heck do they sleep with them?! The in game /doze poses don't care at all about the fact that au ra have horns sticking several inches out the sides of their heads and I'm tempted to just ignore it being an issue myself. I'm pretty sure I've flat out forgotten to mention how my character would deal with that issue at least once. It drives me nuts every time I try to think about it.
Despite all that I still tend to go for lore accuracy myself. The fewer headcanons in an RP the easier it is for everyone to be on the same page. That doesn't mean I'm against them though. I've encountered the au ra/miqo'te have enhanced hearing headcanon and, despite being aware of the MCKF quote that's already been posted, I'm perfectly fine with it. Something like that is fun and interesting to me as long as it's not abused to let your character hear anything and everything they want.
The ones I can't stand, however, are the sensitive scales and prehensile tails headcanons. In the case of the former, I'm pretty sure that's not how scales work. I think the closest thing we humans have is our fingernails. The nerves are under them not in them so how can they be sensitive? I imagine all they can really feel is temperatures intense enough to be felt through them and the pressure from them being touched. Furthermore, it reminds me of that terrible anime trope where catgirls have sensitive tails and they're so sensitive that touching them arouses them. It just reeks of ERP to me for that reason.
The latter is also a that's not how it works situation. I've had cats for half of my life and their tails just aren't flexible enough. I do believe tails kind of act as a sort of extra half limb though. I think, for example, an au ra or miqo'te might hit someone with their tail to get their attention if their hands were occupied. In the case of my au ra, she'll swing her tail like a metronome or tap the end of it to the beat of music instead of tapping her foot.
Also, not a headcanon but I cannot for the life of me figure out au ra horns! Not the hearing or any of that but how the heck do they sleep with them?! The in game /doze poses don't care at all about the fact that au ra have horns sticking several inches out the sides of their heads and I'm tempted to just ignore it being an issue myself. I'm pretty sure I've flat out forgotten to mention how my character would deal with that issue at least once. It drives me nuts every time I try to think about it.