Rarely the 'top', never on the hoods, and 50/50 at the forward bend (between traditional 'top' and 'hood' positions) or on the drops.
Even the drops can be further split between forward or at the rear since I use bar-end shifters.
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'75 Fuji S-10S bought new, 52k+ miles and still going!
'84 Univega Gran Tourismo
'84 Univega Viva Sport
'86 Miyata 710
'90 Schwinn Woodlands
Unknown brand MTB of questionable lineage aka 'Mutt Trail Bike'
Plus or minus a few others from time-to-time