Head to foot sleeping
Posted by: Waterbird on Feb-18-13 7:24 PM (EST)
Many tents now save weight and increase stability in wind by being wedge shaped: both narrower and lower at the foot. You can't sleep head to foot in those tents.
Another very inefficient shape is the hexagon. It supposedly creates gear space in the pulled out corners, but it greatly reduces mattress space. A plain rectangle and equal height on all sides is the most efficient and comfortable in terms of space.