It's a personal preference thing. I love my continuous ridgeline on my tarp. The big advantage is being able to simply slide the tarp over the hammock without any knots or figure 9's, etc. to mess with when making the adjustment.
I avoid conflict between the hammock suspension and the tarp ridgeline by wrapping the tarp line clockwise and the hammock suspension counter-clockwise around each tree. The result near the tree is that they are nearly one tree width apart and they criss-cross each other at the center of the hammock. The tarp is on a slightly different angle than the hammock but not enough to compromise coverage.
"Life is a Project!"