in my speer and switchback-- i am able to get on a slight diagonal -- still keeping with that tradition of laying across the center line. by doing so, the effective length of the hammock is pulled longer between supports...but is still allowed to sag enough to minimize or eliminate shoulder squeeze, while providing a small amount of bathtub support, great for side sleepers.
i've found that with ridgelines .... lounging is really comfortable. but by 2am, my legs have fallen over the ridge, and into the "footbox" and i just can't seem to re-find the sweet spot i had when i went to bed. i hang a hammock nearly everyday- and spend a lot of time experimenting with all the variables i.e. sag, tree strap height, angles, all the great tips i've learned here on HF.
and while i love my wbbb's, HH's, detachable adjustable srl's......i have never been able to match the comfort i find in setting up a GTUL, SPEER or SWITCHBACK at the recommended ~25-35* angle without a ridge line.
an aside... even the way a gathered end is whipped tells a tale... be it gathering from one side to the to other, folding in half and gather at the fold, to the 'W', to a sewn channel , pulled up edges..... and so on. while its easy to say at the end of the day we are hanging a few yards of hi-tech fabric between 2 trees----- there is really so much fun to have finding one's preferred hang