It is a huge pet peeve of mine when people yield right of way (and wave me on) when we both arrived at a stop sign simultaneously and they’re to my right.
I ride a bicycle. I will roll a stop sign if I don’t have to yield. But if someone is stopped to my right I will absolutely come to a full stop and put a foot down 100% of the time, unless they do the correct thing and exercise their right of way by going first, in which case I can just slow enough that they’re clear by the time I enter. So when they insist on being “nice” and waving me on even though they have the right of way, it’s actually super annoying because I end up coming to a full stop unnecessarily and then they have to wait while I get up to speed again…