With lots of metal in drop tunings, you generally end up with riffs that pedal off the open note, something like this
[CODE]
Eb:|--00---8-7-5-0---00---6-5-3-0---00---4-3-1-0---0-4-3-1
[/CODE]
that's from Aggression by Sadus and is a mixture of 8ths & 16ths at 170bpm, for this one you could maybe play the Eb flat on the B string, don't know about you but I struggle to play 16ths at that speed on one string, without doing it over 2 strings.
or Danger Wildman by The Devil Wears Prada in drop D
[CODE]
A:|-8--10-7--7-8---5-7-8—5-4--8--10-7--7-8--5-7-8—5-4-5-|
D:|--00----00----00------00-------00----00---00------00-------|
[/CODE]
My life would be much simpler if it was just a matter of positions, but there are so many other riffs like this in Eb/Drop D/C etc that staying in BEADG isn't an option.