Seconded

Same, I only pull it off when i feel it scratching a palm rest.

Smaller watches, with nylon, silicone, or leather straps help. Big metal bracelet watches always feel in the way.

FWIW mine has a titanium bracelet.

May have to do with posture or body alignment, less than the watch.

My data point: much like GP, I experience discomfort if I wear my (smart/big) watch while programming. Also if I wear a small watch too tightly.

I get a sensation in my pinky that's a lot like what you feel with a pinched nerve.

I just take the watch off if I'm going to be using the keyboard for any period of time. Gaming especially bothers it.

Notably, I rest my left wrist on the laptop body underneath the keyboard area. If I kept my wrists perched in the air, I doubt I would have any of this going on at all.

I feel the same. I can type/game for like 10+ hours straight and not feel a thing. If I wear a watch my hand/wrist becomes to feel uncomfortable within fifteen minutes. It may be due to poor hand posture relative to the height of my desk but I'm not sure.