to whomever,

have spent most of my life fishing upstream whenever possible (on the assumption fish looking upstream) as part of my "stealth" package. ignoring back eddys, when is a downstream approach better?

please note; when i asked this on my local board, all i got was "when the water conditions dictate it" well, that is what i am asking. what water conditions lend themselves to an downstream approach?

up front thanks.