Ball gag cause it holds the teeth open. Looks nice, keeps from talking, but doesn't keep from being noisy lol Tape gag because it seals the lips shut. Also looks nice, keeps quiet, but lacks a certain physical quality to it. (that's the best way I can word the thought at the moment ) Hand gag because I just absolutely love the feel of it! Much more involved with the captor, but can only be used when he's there and keeps him from doing other things to you lol.
With me it's between Ball and tape gag. Tape feels smooth across the lips and if done right really seals them together. Though I havn't tried a ball-gag I like how it looks and how it's used and I really want to try it out myslef.