Preference only: V/S below 10000 feet, and I encourage F/Os to do so. No SOP restriction against Open Descent at my oufit (BLO FL100).
With V/S, if you select A/P OFF, autothrust still supplying thrust for MCP spd: With Op Des (LvL Chg), much easier to forget YOU are controlling thrust (Autothrust ARM).
As well, in my neck of the woods, frequently receive "Descend to XXX, then slow to YYY": Selecting V/S after stable in Op Des (Lvl Chg), and then input the required MCP speed, and that's what you get at level off.