1. No using the send to camp function. There is no in game lore that makes any sense of this, my party will immersively walk to camp to dump off items.
2. No dipping in fire. I would never voluntarily make it easier for enemies to see me by standing next to a light source.
3. No potion throwing, it just doesn't make sense to me that potions can be absorbed through armour.
4. No using shove, it looks ridiculous and I find it immersion breaking. If the distance changes to something reasonable then I may use it only on a high strength character if I ever have one in my party.
5. I engage in behaviours that make sense for the character I am rping. This means that I will not necessarily speak to every npc just to get quests, nor will I even do all the quests I pick up. I also will not kiss the rears of my companions just to keep them in my party.
6. I don't use my high Cha character to speak if it would not make sense for them. For example, if it is a conversation about magic, I will have Gale speak if he is the only mage type I have, even if the high Cha character will get me a better result.
7. I only loot what would make sense to loot at the time.
8. Companions keep their armour until I find something that is better for them.
9. I rarely reload if I fail a roll, only when it makes rp sense.
10. When the game is fully released I will most likely not use fast travel.
11. Characters will use only the spells they could actually learn according to 5e, no heal scrolls on Gale for example.
12. I try to guess at the amount of time that should have passed so I can long rest once per "day." Except for the start of the game where I would be pushing to exhaustion if we had proper time mechanics.
13. I do not move furniture around in front of enemy npcs. It is different if they are stupid enough to already be standing in range of something hazardous, then it will be used against them.
14. Mage hand will only be used properly. Not shoving, attacking, or anything similar.
I am sure there are more that I can't think of right now.
I also make an active effort to use my consumables as much as possible. For me, that makes the game so much more fun, and I don't end up having a ton stockpiled at the end.
I need to try to do this. I tend to only remember to use poisons and healing potions.
I avoid making meta decisions when it comes to combats. For instance, if the party has no way of knowing that there is an ambush, then I won't sneak.
As someone who sneaks and scouts everywhere (in every game) just in case there is a potential situation, I find that interesting.
Don’t pay merchants to improve attitude as I think it’s way too cheap.
I would only do this if it was a merchant we would visit regularly. None of them currently meet that criteria. If there was a permanent merchant in an area we could frequently visit (maybe in Baldur's Gate) then I would consider it for rp reasons.
