That is an interesting post, and one of the few times I really invest time in trying to read through the first post (an issue caused by my own lack of ability to focus, mind you). I'll make my comments as I read it through.
First of all, I come from Scandinavia myself (but I do not regard myself as from any of the nations therein), and have heard the "Jante-law" being thrown around before (and at times targeted at me). Personally I believe it to be an erroneous localization of a general human issue of self-esteem. In other words, it isn't unique to Scandinavia, but Scandinavia has a word and concept for it.
I suffer from severe issues with self-esteem myself, but the origins are very clear for me as to why. I have been caught up in a very difficult epistemological issue that has torn me apart for many years: How can I ever know anything about myself? How can I be aware of what I am? What I can do?
I am terrified that I may be fabricating my beliefs about myself, and that these beliefs are different and inconsistent with reality or how others view me. As such I do not trust anything I think of myself, because I reckon I can't do so. As a result I regard what others say about me as more trustworthy than myself, but even what they say I can not trust, as I may reinterpret what they mean.
However, in addition to this, and likely more related, there is my reasoning that it is better to think negatively of myself instead of positively. For I judge positive thoughts about myself to be a path to arrogance and selfishness, which both are qualities I deeply despise. As a result, many positive thoughts I have of myself I ask to justify. But because I can't justify the positive thought I sometimes (or frequently) turn it the other way around.
Openness might be my most pronounced trait. I rarely hide away myself, and I often reveal things about myself which others would find awkward to reveal. Sure, my core is still fairly hidden away from most people, but in general I have little to no inhibitions on what I reveal to others (for example, I find it fun to voice my interest in getting a dakimakura, and love to see how irrationally people react to that). Of course context is important, but.. err, I could end up talking about this for a long time. However, my rationale for being so open is quite strange. I sometimes feel like I am being selfish if I hide away myself. I'm not sure how I should explain it better.
You echo many words that I have thought before. Thank you.
Well, it seems like I at least expressed some of what I wished to express, and I responded to some of what I wished to respond to. I've probably forgotten or misinterpreted a lot though.