Was taught many moons ago-reset to STD
Have had colleagues who did likewise .. I get uncomfortable if more than standby is reset in anticipation .. most of us have been caught with a revised clearance to maintain on the way up ... and either forgotten, or been at risk of forgetting, to reset the clocks. Right or wrong, I put my faith in rigorous attention to transition scan so that, even if we got distracted and the scan/check was delayed, the matter would be fixed sometime in the next few thousand feet .. on the way down, our routine check at F150 was considered close enough (and unlikely to set us up for being caught out) to transition (in Oz and local, anyway) to set QNH in anticipation ...