There's a good thing about being a pessimist... You're either proven right, or pleasantly surprised :P

But I used that method in pretty much.. everything. I expected disappointments and failure, and I expected the worst possible scenario. That, unfortunately, landed me in therapy (partially).
I still do that, and I do it in session as well.
Tbh, I think it's a form of cowardice (please don't bite me for that).
It's easier... but it's not better.