Another factor in this decision is what you use the hatch for. If normal practice, for example, is to haul the appropriate sail out of the Vberth to hank on, then you're more likely to have the hatch open at times when water may get on deck.. on the one hand the open aft arrangement will minimize water below, but the open forward makes it much easier to haul the sail out (and to stuff it back down later)
In today's world of virtually universal roller furling, I suppose that's not the concern it used to be.
I think for coastal, sheltered water cruising, and if you pay attention when things get bouncy, that the typical "hinges aft, opening forward" makes sense from a ventilation point of view esp. on those hot summer days.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)