He'd never admit it- Gordon
He'd never admit it, not even under the threat of being force-fed the worst of Grandma's kitchen disasters, but Gordon absolutely hated calling up to Five when John was asleep. Not because it'd wake John, that was the reality of their life (and it was a bit of payback for all the times John woke him up in the middle of the night) but because he never knew for sure if John was regular-G sleeping or zero-G sleeping.
Regular-G sleeping meant that John was using his bed. Zero-G sleeping meant he was using a sleeping bag velcroed to the wall somewhere in Five like the old-school astronauts would do. Sometimes he'd velcro himself there vertically, but usually he'd do it horizontally because it gave him more headroom in whatever section of Five he'd needed to 'camp out' in because a project needed babysitting. The one that had cinched Gordon's issues about calling Five had been when he'd velcroed himself to the 'ceiling' of the gravity ring.
Seeing John's hologram of him sleeping like that- eyes closed, mouth slightly open and arms hanging in mid air because in zero-G arms would just do that- something about it conjured up all of Gordon's memories of underwater body retrievals because floating is floating, be it water or zero gravity.
So he rigged his calls to have a slightly longer 'ring tone' before the image pick up engaged to give John time to wake up and not look dead.
If John realised that, he never said anything.