Yes, but there is a categorical difference between having a personal code and having an external code, and the experience of living with the two is different. And if the character is in fact living up to the code, then the DM really doesn't have to do anything at all. And if the Oath is really just witnessed by the player, then really only what you have is a oath that represents a personal contract with yourself. And a contract that you make where you are the only party in the contract is very different than a contract you make where there is a second party in the contract.[/quote[
The only difference is in the recognition of others. Literally. Adhering to an external code is only different from a personal one in that others share your code and can expect behavior from you. In the real world, this is returned by exclusive access to whatever code organization's resources that's above and beyond normal people's. The actual effort needed to follow the code is no different -- your argument is specious on that aspect. Nor is there less nobility in a personal code than an external one, so, again, specious. Your argument really seems to boil down to "unless someone else judges your adherence to a code, you could cheat and no one would know." Sure, but isn't that up to the person?
Finally, the difference in the fiction of a PC in a fantasy game is much, much less. There's nothing special about the paladin's suite of powers that makes it stand out from other classes as more. Yet, because of your personal hangups, you're going to subject any player of a paladin in your game to stricter confines of what's allowable in roleplay. And, to be fair, you're more than welcome to do so in your games. That doesn't harm me and I wish you the most fun possible in doing so, provided your players have the exact same beliefs you do and as much fun. However, arguing in the open for how it should be rather than how you do it is a bit past where I'm happy to keep my opinions to myself.
I don't think that is true. I know that is true. For one thing, I'm one of those players that thinks that is fun. For another thing, I have a player know who by personality is pretty much not capable of playing a character except with a lawful mindset. Every character he plays ends up lawful, and while he gets teased about it by some of the other players who think he should be more flexible, he does make a really great Paladin.
I don't have to make this player put himself under external codes. He's going to do that all on his own regardless of the class he is playing.
No, I think your still missing the core of what I'm saying here. Again, there is a categorical difference between a personal code and an oath sworn with yourself as the witness, and an external code where you call upon a second party as witness.
The difference is that you get more from the second than the first, yet you're unable to explain what more you get from doing so. Swearing an oath to a second party openly is only done because of what you get in return -- even if that's personal. The difficulty in following either is the same. The results of breaking the open oath may not even be as bad as breaking your own personal oath to yourself.
And further, you still seem to be in this mindset that this is all a metagame thing, with this being between a player and a DM. If someone in my game takes an Oath, and calls a deity like Aravar the Traveller as witness to that Oath, then Aravar the Traveller is the one that is judging whether that Oath is upheld. And I have to somehow put myself in the place of this being and decide how Aravar views the situation.
Aravar the Traveller
does not exist. There is no Aravar the Traveller observing the behavior of the PC and rendering judgement. It's all you, as DM. You may put a funny hat and voice on, and do some pretending, and everyone may get a kick out of it, but it's still you and the player. There's literally (<-- correct usage) no one else here, especially named Aravar the Traveller. This is a very bad take that often used to justify very bad behavior, although usually is phrased as "that's what my character would do!" I reject this absolutely.
You may provide evidence that Aravar the Traveller is a being that exists and renders independent judgement and I will reconsider.
Which is why I put my parenthetical side note at the end. In actuality, the Champion homebrew class in my game is vastly more flexible than even the 5e Paladin with respect to it's particulars of what it means to be what D&D traditionally calls a 'Paladin'. There is a very strong possibility that a player could ask to play a Champion of a deity or philosophy that I've never really thought about much in my game, and in that case there will be a long Session Zero session where we mutually hash out what the expected behavior of that Champion will be. But once that is decided, the deity and not the player character is the one that decides if those expectations are being met.
I'm sorry, do parenthesis render something non-commentable, or otherwise alter the meaning of something from the plain words? I don't follow what you think funny marks around your point render it somehow special.
That said, you mean YOU are the one deciding if those expectations are being met. And, since YOU have issues grasping an oath from a non-lawful being to a non-lawful being (fictional, of course, we're really talking about player and DM), then you'll probably create a lawful set of strictures, regardless of the fiction. I mean, can you conceive of a Champion that gets to define their own oath and if they've followed it because the entity they're championing couldn't be bothered to define a set of rules?
I'm not even sure what you mean by that. If you swear an oath of vengeance as a chaotic evil character, who is the witness you called to hear that oath, and what do you expect that witness to do? And why if you are chaotic evil would you bind yourself in that fashion? I mean I'm not saying you can't, but it does seem a little bit out of character. If you are swearing in such a way that you are the witness to the oath, then of course you get to decide how to keep that oath. I've never denied that chaotic evil doesn't exist, and can't swear oaths, but then considering that a chaotic evil character believes that there is no such thing as truth, and no external thing that by right ought to constrain them, pretty much every oath that they make is probably one they intend to break either by letter or by spirit.
Yeah, your inflexibility is very clear.