People that are so self-absorbed they have no clue as to what is going on around them. Such as people who text or talk on their phones while driving. Or stop and stand in the middle of an aisle blocking so others can't pass and they have no clue someone is even trying to get passed.
People who drive too slow in the fast lane and won't get over. People who text and drive. People that walk in the street when a sidewalk is available. Telemarketers. People who are overweight, complain or whine about it but won't do anything to try to change.