Yeah, about that....
You're notion of how this "should" work isn't practical. On numerous lvs.
1st: See, I'm a DM on Thur. And a Player on Sunday.
Please explain to me how I'm supposed to do my job on Thur if, as I'm a player on another day I should restrict myself to reading only the PHB.
Further, please explain why I should forgo enjoying only one or the other aspects - DMing/playing a PC - of this hobby.
What you are when you begin to run a game is a DM. That's going to stick with you. You are no longer a player in a static sense. You've become a DM who plays as a player now. Or was a DM that is currently playing as a player.
I believe you're misinterpreting what I'm saying. I'm not saying that you
should not be both a DM and a player. I'm saying that because that isn't the expectation, a player should never read such books
as a player.
2nd: If the PHB is the only book I should be reading as a player.... I'm concerned that this will make it very hard to access PC info from Sword Coast/Xanathars/Mordikanians/Volos/Eberron/Wildemont/any of the MTG books....
Those books are optional, open to the DM permitting the characters to be any of the races available to them. Or banning every single one of them. If you're like me, you'll typically allow players to play such races and classes. However, the books need special care.
3rd: In fact not reading anything but the player specific stuff in the Eberron/Wildemont/any of the MTG books would also make it VERY difficult to enjoy playing in any of those settings. Besides, if I'm parting with $50 bucks for a book? I'm reading the whole damned thing.
That's a funny statement. I wish more people were as passionate about the DMG as you are with supplementary books.
But I disagree not having knowledge of the setting makes it harder to enjoy. In fact, I believe it's the opposite. Not knowing Eberron, FR, SC, WM, MtG makes each of them much more fun as you get to be surprised and the lore can be experienced rather than spoken.
Well, as I said, plenty of us are both DMs & players. Different days or alternating campaigns. And even if I was only a player? Once I've run into a monster I can deduce it's stats in play. That knowledge doesn't erase itself between encounters or between campaigns.
Absolutely. I've ran into a similar problem before. However, that doesn't mean I should act as someone that knows the mechanics are.
Be in the shoes of a player that never has been a DM playing alongside you. Same exact character build, except you have the knowledge of the system beyond the PHB. The player isn't able to predict an enemy's movement like you can and you can shut them down using their knowledge.
There's no reason why the other player would know Orcs have agressive and understand how to properly position themselves to avoid it. You do, though, and you've artifically tipped the balance in your favor because you've DM'ed before.
But being a DM should not be something that decides whether or not your character is more effective than the other. Otherwise, people will feel underpowered because they don't have as great system mastery. In that case, it will feel like a requirement that they
must look at metagame data to keep up with you. They need to be able to predict the circumstances as well as you.
It's almost like having ran an adventure before and now being the player. It's bad form to use metagame knowledge to try to be preemptive about your choices.
Running monsters is definitely no different.
I've actually been studying Mephits as a DM because I had recently placed them in a dungeon I created when my DM for an adventure had them as enemies the same week. Well, I played as if I didn't know they exploded and they had breath weapons. Went up in their face ready to take the full blast.
Funny enough, the DM homebrewed those abilities away, anyways.