You force me to hunt it down. Specifically:
but as I noted, I was remembering it poorly, and relying on David to remember it better, hopefully with my prompt.
But I think my point falls in line with it, too. I make someone with Puissant Ability, I want to have stories where that character uses that ability. The SG goes in knowing I want that, and I have a reasonable expectation to use that ability. I expect my virtues to be the signposts to the playstyle I am hoping to see from arc to arc.
I make a character with Tormenting Master, I'm not expecting the wizard to show up all the time, their appearance will be a surprise. I don't expect flaws to be a part of every story, I expect them to be the spice that seasons the main course.
When you say "in the way," I see that as obstacles, which are at the heart of the stories-- the personalized challenges to overcome alongside the arc's external challenges.
When I say "surprised over" I mean that those Flaw-inspired stories are unexpected. For instance, the wizard went to meet with their Parens, and the Companion traveling with them was recognized by an old acquaintance in town who leaned on the Companion's Favors flaw, which created an entire subplot, separate from the wizard's primary mission.
You don't know when stories, arcs, scenes, events incorporating flaws will come up. They're "unexpected."
You plan on stories utilizing the elements of your Virtues, because those are the things you've built your character to do, and the SG is supposed to be paying attention to what characters are good at, and tailoring material to them is part of the gig.