I think the way Fate wants to engage dramatic situations isn’t through directly “challenging” an individual Aspect, but by having the GM look at connections and resonances between aspects in a way that suggest themes — to my eye the scenario creation rules in the Dresden Files RPG have some similarities to the way Mouse Guard mission creation works. I’m skeptical about whether Fate can actually deliver on this type of play in practice — my experience playing Fate has been that I consistently get more involved in the internal life and/or dramatic potential of my character than ever gets developed during play so I end up frustrated.