One thing I hate is people who are late for appointments. I just think it’s disrespectful of the other person’s time to be late, it’s like saying that their time isn’t important to you.
That is why I get annoyed when people wait to the last minute to leave for a destination. They look at Google maps, and if the map says 48 minute travel time, they will leave the house at 9:12 for a 10 o’clock meeting. If they are late, they blame traffic and not their own lack of planning for their tardiness.
I was always taught that if you are 5 minutes early, you are already 10 minutes late.