Re: Apple engineers versus an editor's ability to set persistent in to out points in their footage.

[Jeremy Garchow] "You hit f, you have a temp favorite, you can always delete it, just like you can always set a new in/out in fcp7."

The nature of FCPX and Favorites is that just as one can add one with F, one can just as easily remove the Favorite with a U or, even reject if, after having examined it, you decide to reject it outright with Delete key.

Basically . . .
F saves the In/out (Range)
U removes it (FCP7 Shift X if my fading memory serves me)
Deletes adds the ability to temporarily make something gone (persistent invisibility until one decides otherwise)

I think people are bothered by having to hit the F key all the time as it's too easy to wander off and lose the range. Over time, hitting that extra key or the extra work when one forgets, can cumulatively slow people down during a session. Having to be conscious of such almost seems antithetical to a "the app gets out of the way to let you edit" philosophy. Personally the only answer that might fall within FCPX's model (or programers model for it) is the "auto favorite."