And does this unfairly paint them as less agreeable than they would be if you presented what they said with a normal voice?
To be fair, if emotion isn’t involved, that’s basically just a sign of indifference. You owe it to yourself and your “opponent” to actually care about whatever it is you’re discussing. What truly matters is understanding and prioritizing the why behind your feelings and honoring that, regardless of whatever random impulse those feelings are currently bringing about.