I know a GA Inspector out of IND that is a really good guy...and the folks out of Washington that would often ride the jumpseat in/out DCA were in my experience always very friendly and professional.

Everyone is prone to a boneheaded-move, especially while being observed, and double especially when in a sensitive simulator...but checkrides aren't new to you once you get to the 121 level and you'd better get used to them as you're going to have them every 6-12 months for the rest of your career.

If probie ride candidates know their systems, flows, profiles, procedures and OpSpecs cold then you should have the oral on lockdown and all you have to do is fly the damn simulator without crashing or continually busting standards and you're fine. That said, the standard "CKA having a bad day" disclaimer applies...