Almost everyone has a certain degree of 'unpleasantness' to them; I like to call this the tolerable degree. Many of us can be moody, curt in our responses, or just not in the mood to deal with people. Yet, we somehow find a way to relate well with people without them wanting to avoid us completely.
The case is different for obnoxious people; obnoxious people are people that are EXTREMELY UNPLEASANT to be around. They are the kinds of people many of us would jump into the red sea to avoid, and if you are a nice person, you'll only be able to take obnoxious individuals in doses of once every six mnonths. In other words, you'll only be able to stand such people for a couple of hours once every six months before you run for cover.
