[bowlofpetunias]

I'm always torn about this one. As a manager, I hate this guy. They can completely undermine a team's motivation.

As someone who's been in this business for 30 years I've come to recognize that "unlikely failures" is just a synonym for "pretty sure it's going to happen at some point".

Also, there are way too many programmers around that are the exact opposite, and don't see any of the obvious ways in which a design will fail, so I tend to be kind of protective of those that do.