Honestly, as long as your bow isn't horizontal or near horizontal, I wouldn't worry about it too much. Other's may disagree with me and tell you differen't, but I wouldn't worry about it. I tilt my bow slightly to the right when I aim. It doesn't affect my shots any, I don't hit my arm, and it's comfortable. I do it consitently. Some may call it bad form, but I'm not a pro target shooter. I'm a hunter. As long as I can group my arrows decently with the form I've got and am confident enough to take an animal this fall, I'm happy.

If you shoot well the way you're comfortable shooting, shoot that way. If you plan on becomming a professional target shooter, worry about getting that perfect form. Like I said though, I'm sure many are going to disagree with what I said so...