Even when I meet them in places of common interest I am surprised to encounter like-minded creatures. I suppose that’s part of the human psyche, to imagine ourselves so individual as to be unique in all ways. What we really are is unique combinations of characteristics, so we might be better explained as having innumerable subsets in common with others, but not all with anyone else.
And that makes for practically infinite possible serendipitous discoveries of the shared traits, ideas, bits of history, likes, dislikes and curiosities. The potential for finding ways in which we are like others is probably greater, when it comes right down to it, than for finding differences.
Of course, having desires in common means that, like siblings, we still find our shared interests a reason–if not an excuse–to compete with each other, even to fight. We might get a bit too busy comparing ourselves with each other because of our commonalities as well, and whether we think ourselves superior or inferior the imbalance in the equation can lend itself to conflict. We are contentious beings, we humans.
But all told, the advantageous delights of finding others with whom we share views and loves and hopes and pleasures far outweigh the complications. Whether we are introverts or extroverts, worldly or otherworldly, there is great happiness to be found on discovering kindred spirits. It is possible to live our own fairytales when we find the right characters with whom to share them.