Comment by DeathArrow

Maybe I am cynical or a jerk but I don't like most people. A few people I genuinely dislike, most people I am not interested in and a few people I like.

I don't feel the need to build rapport or have close relations with all people. Either we genuinely click or we don't and it's fine for me anyway.

I trust myself enough and I don't crave the approval of others, I don't crave affection.

That being said, for work, in professional circles, with some aquitances, etc. I need to build good rapport and build trust fast, to the point that we build a good relation but not to the point we are friends. And it seems quite easy: be a good listener, echo their opinions, voice their unspoken concerns, summarize their opinions, be appreciative, repeat some key words from what they are saying, be appreciative, don't be judgemental, be genuinely friendly, tell jokes, look them in the eyes, smile, mind your body language and a few others.

When coming in a new workplace, there are people who still didn't integrate well or get along with other people well, even if they work ed there for a few years. There are people that need years to build a relationship with others. But for me, in a few months more people see me like I worked there since ages. I just signal to people that their ideas are mine, too, that we are very much alike.

People are set up to trust other people because that is the easiest way and takes the least effort. If you help them trust you and like you, they will.