It's the idealist part that comes with who we are. We will never meet the high standards we have set for ourselves in our minds
Fear of failure is a biggy inho.
I notice whenever I try something new, in the back of my head i'm terrified of failing or screwing up in some way hence the nervous-ness/seeming to be more focused on the task then forming relationships just cause it's so overwhelming in itself.
I set
very high standards for myself, and If I don't reached a certain level of competency I beat the living daylights out of myself mentally and emotionally. It's very exhausting as everything I do I see how i need to improve and when I've failed in someway I get real down on myself.
I think this is why I come off so serious when working cause I'm so focused on doing a competent job well done in my eyes *very high standards

*
that I really get down in it and try my best. I probably come off alittle stressed/scatter brained at times haha.
I judge this lack of competency in everything, any little failure is blown to massive proportions in my head and I intensely focus on it, I keep reanalzying it out of frustration with myself as to detect where I went wrong, where can I improve *Fi-Si*. I'll probably cry alittle if I feel i've really let myself down or others.
I probably appear like a very serious individual when on the job as I take anything I do seriously and there's this extreme focus mode I get into.
Also on the people probably like us more then we think thing. I can believe that but also how we sometimes in the back of our minds doubt if they seriously do and I guess that's why we strive so hard to be competent cause we want to know we earned that "Excellent blah blah xD" not just out of being nice. Cause no matter how many times someone says excellent or whatever if internally I'm feeling I failed to reach some level of competency I'll still beat myself over it just the same

. INFPs it's serious buisness

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We probably seem alittle distant from others too/aloof perhaps. Doesn't help were not so aware of our surroundings so that probably has us looking alittle out of step from the world at times. I've always struggled with the physical, life story.
Just thought i'd add something

. Sorry if I repeated anything that's already been said.