I have found, in my own personal experience, that most non-human PCs get played in a much more stereotypical way than human PCs, something I don't like. As you said, you can do anything with humans, something you can't do with other races, so I see no reason to use them. I have also found that restricting PCs to humans only gives me a much better toolkit, it allows me to contrast the "mundane human world" with a "fantastical magical world" something I much prefer to the toolkit you imply. The more aliens that are running around, the less interesting each alien becomes.
In a fantasy setting I would have no problem with a human that has demon blood, or is part demon, or even part god like Hercules. They don't need horns to have demon blood, also, they don't need to be a whole different race. Also, given the existence of magic, I could see humans that have lived long enough to see the Roman Empire rise and fall. Again, they don't need to be a different race to do that, just magic!
I'm glad people find non-humans narratively useful, I don't.
For my table, absolutely! For your table, not at all! If you want 799 playable races, go hard! I don't! So unless you want to tell me about how I'm not following TheOneTrueWay by allowing non-humans in my games, you can sod off!
I'm not sure I understand what you mean here.
I'm not looking to gain anything other than to preserve my own fun as a DM. I don't gain any fun from having Centaur PCs. The player of a Centaur PC in a game I'm running might lose out on a lot of fun when they find out that human settlements have human sized doors, and that means the entire session that's dedicated to the King's Grand Ball sees them standing out in the street by themselves! As for the whole fluff thing, it's just fluff, to me, it is meaningless, as it can be changed on a whim and has no mechanical weight.
Have all the fun with non-humans as you want! I will have my fun without them!
I still think not having non-humans as playable races is a good thing.
I don't.
If non-human characters can be whatever a human can be then why bother?!? If a Klingon can be NOT an honor bound warrior, then they are just a funny looking human. I posted a whole bunch of stuff on this earlier in the thread, feel free to go read it.
So, all non-human races are just funny looking humans? If yes, what's the point of having non-humans? Funny looks and mechanical bonuses? That's what I think, that's why I don't bother using them.
Missed my point. I use good humans and evil humans. I also use monsters that are not humanoid and are evil cause they are monsters. You also again reinforce my point about how non-humans are just funny looking humans, that's the essence of why I don't like using them. I got tired of rubber forehead aliens a long time ago.
You sure like to read into what I'm posting. You should stop that.