Right, so some somewhat more comfortable variables for me have turned out to be:
pm_walkbob 0.185
pm_crouchbob 0.14
pm_runbob 0.43
Can't guarantee they will feel right to anyone else. They don't entirely feel right to me either but we're getting into the ballpark.
While we're at it, let's discuss some more controversial territory. Player speed, which has gameplay implications.
It wouldn't be very nice to force anyone to make their guards run faster, for instance, but to me, the player speeds feel neither particularly stealthy nor particularly hurried when you want to be in a hurry.
I have pm_walkspeed at 75. Feels like you mean business when you walk to things, like its important that you get to that thing today.
pm_runmod is 2.25, which is much less sluggish than the current player character, but also careful enough that he conceivably could be making sure to step carefully down staircases. It doesn't really feel like the player is truly hurrying until up at around 2.5 or so, though.
pm_creepmod is 0.65, which has our character in somewhat more of a hurry while sneaking, while still being audibly careful.
pm_crouchmod is also at 0.65, making crouched walking somewhat more athletic than the default, while crouch-creeping is still painstakingly stealthy although the character sounds like they are skilled enough to still do it faster than a beginner.
In my subjective opinion, it sounds more natural with these values, from the perspective of a player just using their imagination. Which is the perspective that mostly matters in a game. Not to knock anyone with professional experience who's here to tell me there's no way this could be stealthy.
The other thing is, I don't think any of these updated values seem casual or blend in like someone who's "supposed to be walking around here". But unless you're on a guard's route, you'll sound out of place at any speed anyway.
Its certainly better to minimize contact rather than try to blend in. And with limited windows to move, I think players might prefer a more hurried pace from the player character like this. The lower bob values for walking and crouching, and higher values for running help to make it sound more natural, speed mods or not. Better not to let the tail wag the dog on this one.