I do. I justify the action via mechanical / prompting logic (my instructions are to treat me as an informed peer and my understanding is that keeping the whole conversation in "two peers talking" register makes it easier for the LLM to maintain that mode).
But, more honestly, it's just a social habit and saving keystrokes isn't worth training myself out of it.
Exactly, or rather, the social habit part I agree a 100% with. I don't want to train myself out of being a polite human being, just to save some keystrokes.