Yes, but no. Being pessimistic is good for the big things, such as being a CEO, or becoming a mainstream YouTuber. But then, it's good to be optimistic about smaller things, such as getting a raise, or getting a date. At least, that's how I try to see it.
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StereOtaku
GawenStarTeller
Even though I'm sort of a pessimist myself I have to disagree. Some optimists don't get disappointed in things, either. The entire point is to see the bright side in even the most dire circumstances.
If you're so focused on pessimism, eventually you'll be so focused on the bad things that even the good things in life don't faze you since you have no expectations.
If you're so focused on pessimism, eventually you'll be so focused on the bad things that even the good things in life don't faze you since you have no expectations.