Generalizing:
Take lean and direction off the table - should you face the bad side or the good side or does it matter?
Put a slight lean back on the table, should you fall with the lean, angle to lean or against the lean? I get the pounding part, so assume sound top.
Ron
Hope this answers...
You want your hold wood to be in as much solid wood as possible, so if fall direction and lean are not issues, go for that.
But if fall direction and lean are an issue, then you have to make do with what you have, doing your damnedest to have something resembling solid wood in the hold wood. barring that go for hold wood all the way across, or as far as possible anyways, this is where that ole adage of 30% face gets completely **** canned and you work with what you've got, be it shallow or super deep, as long as you leave room for wedges, or don't get yer saw pinched on face cut...
Essentially, any punky wood isn't doing anyone any good, having nothing but punky wood in yer hold wood, will cause bad things to happen, any punky wood in hold wood will cause the tree to do things you don't necessarily want it to do, basically severing one side or the other causing it to turn, often in a bad direction.
Snag falling is an ass ache, with the best of conditions (cause its a snag, and already the worst of conditions) when possible dump em with their lean, when not possible take the next easiest route, the more difficulty in tipping one the more likely your are to get hurt or killed trying to tip it.