This is interesting, because I was just reading an essay of Schopenhauer where he claims that his own pessimistic temperament is the best way to preserve some happiness amidst the troubles of life, because of its low expectations.

Maybe the broader lesson is that, whatever natural temperament type you have, whether cheerful, stoic, or pessimistic, that temperament is your built-in way of adapting to life, and you will be happier overall if you own and embrace it.

Philosophers have been accused of turning their own inclinations into a theory that explains why their way is the best for everyone else as well. :)