I have no problem laying on my side or even stomach in my hammock. Maybe the HH just isn't for you.... Check out Shug's video on the snipe hammock by Wilderness Logic. It's what I designed my DIY hammock after and it's super comfortable. And I'm a very restless sleeper and was concerned about sleeping on my back, but I don't have to worry now....
Progress is man's ability to complicate simplicity.