There’s a weird believe that we Testers need to be pessimistic in order to be good / professional / successful.
In a course I impart (where I am required to use slides made by a colleague) there is even a bullet saying that good testers require “professional pessimism” as one of our main traits.
I apologize to the person who came up with this notion, but what a bunch of crap!
Most of the greatest testers I know are Fearless Optimists, and I think this is actually one of the trait that makes them exceptional testers.
Testers need to be optimistic in order to be able to find a huge showstopper bug and instead of saying “This is it, this App is Busted!” and turn to another task, continue our testing task with even more strength to find additional issues that require fixing and make sure the App is released correctly.
A person needs to be first of all an optimist in order to be a dreamer, and only a dreamer can sit with a design document or a screen sketch and come up with user profiles and scenarios that will allow her to test the AUT realistically.
And maybe most importantly, only an optimist can come to work each day to find bugs and look for flaws in the work of others, and do this convinced that he is doing it for the greater good of his team, his friends, and his company.
So next time you hear someone saying that you need to be a pessimist in order to be a (good) tester do all of us a favor and correct this person, and remember to do it with a smile on your face