I sleep one of two ways:
1) Feet aft, because, like Roger, I like the "view" into the cabin and out the door to the cockpit. It does give less headroom though, and one has to be careful in sitting up (the turn of the deck is hard as concrete!).
2) Athwartships at the after end of the berth, head to port and feet to starboard.
#2 is roomier, but #1 seems nicer for stowing day things in the V-berth (along starboard side).