Here is some information on the eyes that are often used in animation and manga It is meaningless to say which is the best design. The problem about eyes is that although you can draw them perfectly well face-on, you can't even draw the eyes you are best at drawing when the direction ot the face or body changes. It is fun deciding things like the color/s of the pupils, the number of eyelashes, and whether the highlights should be round or square. But these considerations take over and you tend to forget the overall shape. The biggest pitfall you can fali in though is you can't draw the eyes when the angle of the face changes.