I've been using Debian for a couple of years now, stability is the first thing you need for a machine you use for work everyday...but for the same reason I also like and I had the chance to make a couple of installations of Centos. I also used Fedora in the past and I think I'm gonna install it again on a partition I purposely left free on my hard disk...
I like this article because it highlights a rare quality, especially among the leaders: the ability to question yourself. I don't see it as something making you vulnerable though, not necessarily. In the end, it makes you stronger, as it leads to know more about yourself, both weaknesses and strengths.
If you don't ask yourself tough questions, you will never know.