Some quirks i have that may drive people away. (One can hope).
i have this notion that few people are ALL good or ALL bad, but rather have good and bad ways of dealing with different roles, aspects of living. In most things i cut people a LOT of slack. Maybe they're having a bad day. But once they SHOW me who they are...i trust my perception unless i get solid contradictory evidence. This is because the worst events of my life occurred when i silenced my perceptions in the interest of being 'fair' to someone else who promptly took advantage of what they saw as weakness. The same people of course complain when you cease trusting them.
Perhaps it's my tendency to take people at face value, accept that they are who/what they say they are, being only mildly cautious if they're seeking money or love from me...but i'm often surprised after observing them for some time how greatly they've overrated or under-rated themselves. The second can sometimes be corrected by facts, the first are usually impervious, unswayed by anything.
Some may find it unreasonable of me, but i intensely dislike it when people put words in my mouth and then argue with their own words instead of what i actually said. As a side note i don't like it when they do that to other people either. It gets in the way of real communication: of people coming to some understanding--not necessarily agreement, just a comprehension of the potential validity of each other's perspectives.
i abhor the mistaking of cynicism and sarcasm for superior intelligence, for being 'intellectual'. Perhaps the strong current of anti-intellectualism in the USA was in part fostered by encounters with such people...just another reason to deplore it from my perspective. Don't get me wrong, there are situations that call for sarcasm...but if it is one's default mode of communication...kind of waters it down, and certainly makes it easy for people to not take you seriously when there may be valid points in some of it.
There's probably more obnoxious notions i have, but that's a start and i don't want to drive EVERYONE away...