My iritation? Approaching a 2 way stop where I have the stop, yet people with NO stop insist on stopping for me. (or think I'm going to blow through MY stop sign)
I always stop and a stop sign with traffic around. If I'm alone I'll cautiously go through it sans a full stop. Now I have to stop, wait for THEM to get going, when they shouldn't have stopped in the first place. Had they just gone through I could have cruised through alone.