Nothing wrong with hanging from your ATC or figure 8. However, if you plan on hanging from an ATC or figure 8 for any length of time (i.e., not just pausing on the way down to remove a stick, I suggest employing a mule hitch to lock off your descender. Think it'll give you better results than an friction hitch (in this case, we'll use the term "autoblock") for two reasons:
1. A properly engaged autoblock essentially renders our bridge ineffective as far as being able to slide through the carabiner when rotating side-to-side. It is a second contact point that holds the bridge in place so that movement is limited. This may increase the difficulty of shots behind you. In your case, you'll find it limiting when rotating to your right.
2. An autoblock may actually be loosened/released if bumped or while attempting to rotate on your bridge. The likelihood of accidental release depends on factors like where the autoblock connection point is located on your saddle (where you attach your carabiner), length of cordage used for your autoblock, type of friction hitch used, and if your saddle has periphery items that may come in contact with the autoblock when rotating (buckles, loops, lineman belts, bags, carabiners, etc.).