I find the dichotomy of pessimism/optimism and positive/negative not very useful in daily life, I prefer to think of defeatism and naivety. To me realism or (practical) optimism lies between those two.
You can't go through life either distrusting everyone and everything, nor can you do the opposite and live a good life. People don't like negativity because it ruins their mood, but you sometimes have to be critical. People also don't like positivity because they feel it sets too high of a standard, but to do anything you need a little hubris.
You can't go through life either distrusting everyone and everything, nor can you do the opposite and live a good life. People don't like negativity because it ruins their mood, but you sometimes have to be critical. People also don't like positivity because they feel it sets too high of a standard, but to do anything you need a little hubris.