Tinkerisk:
People too lazy to use the turn signal (I'm aware that I might hit up to more than 50% of the drivers depending of their country)
Pet peeve. I don't know what it was, but when I moved to NZ it seemed people were better at indicating here than in Norway, but darn.. These days most cars I meet in traffic in NZ either don't indicate OR they indicate as they brake and turn, as if thats any help...

