I used to go with trying to be subtle. I felt it was fair, if I was posing whatever the same way every time, that I could expect other people to pick up on this and whatnot. Then I realized a few things.
- I am not as clever as I think I am
- I am really not as clever as I think I am
- If I can't remember the details of a scene last week clearly, how the hell do I expect anyone else to?
- Players are not characters, and stats like 'perception' and 'empathy' exist
What you think is a subtle explanation for something is likely just too obscure. They're not picking up on it because you are not actually making sense to anyone but yourself. You might think 'looking down' is a clear signal, but those two words in your entire pose have weight to you, not the people you're playing with. How do they know that they should be putting special emphasis on those words more than 'the table' or 'looks at the person who walks in' or whatever? In the example of the leaving the same way every time -- how do they know that isn't your go-to as a player for 'crap, I have to go OOC'? If you don't give the people you're playing with enough reason to suspect there is more there, they will never suspect it. It will not happen. You are entertaining yourself with how clever you are, but no one else.
I'm not actually saying you actually think you're particularly clever or anything, but it's an easy way to explain how seriously, people just don't do subtle in text very well. They don't write it well, they don't catch it well. When you try to play on subtle, you're shooting yourself in the foot. My RP has gotten so, so much more rewarding now that I straight up beat people over the head with things that might be 'subtle'.
While the character is what's important, the player has to at least understand the situation well enough to have their character react appropriately. Their character may not understand the situation as well as their player does, but for the player to be able to make that determination, they have to know that it's there for them to make.