[Zenagirl]

Hmm, interesting point of view. I had the exact opposite experience as her. When I had a jacket BC the air moved all over the place and I had a heck of a time with rolling. Since going to a wing style (Zeagle), I've never had the problem. Oh yeah, but now I also dive with almost NO air in the wing since I'm perfectly weighted (just a tiny puff if I'm deeper than about 60' usually).

My husband moved from a jacket style to a wing style (Zeagle) because of the roll that the jacket allowed. He found it extremely difficult as a photographer to get into the positions he wanted to take pictures (avoiding marine life) with the jacket. Since going to a Zeagle, he can get into whatever weird positions he wants and not worry about the roll anymore. Since he was an experienced diver before he got his Zeagle and has as much air in the wing as he did in his jacket, I'd have to say his lack of roll has more to do with where the air is rather than a lack of air in his BC. But he is also weighted and trimmed properly and barely has air in his wing like me.

IMO first it's important to be weighted and trimmed out properly so you don't have to worry so much about air in your BC. Once you've got that down, then you can pay attention to any roll or effects from your air cell. If you can feel your air moving and if affects your diving, it might be time to look to a different style of BC.