The glasses in your profile pic look fine to me. They seem to suit your face shape. I have the same problem when shopping for eyeglasses, it takes me forever to find frames that I like. I've tried to go by that face shape guide, but it says that round frames look good on my face shape, and I hate round frames on myself. I tend to go with an oval-square hybrid shape personally.
If that's you in the pic, those suit your face fine. I wouldn't take the face-shape guide as gospel...some might better for extreme versions of certain shapes but I'd say you could wear any glasses and look good. If you have super high and wide cheekbones one style would be better. As far as I know you don't have any exaggerated features so you need not worry