PROS: the most popular option when you want images to send to the media as well as put on your website; people will crop off the white in most cases, but you know exactly who you are and whom to credit. Venues where you are appearing may print the entire image to post outside for the public.
PROS: excellent to put on your website and other social media, since you may not need your name, but may forget to list the photo credit (required for all uses). Perfect when you want to make a print for personal use/framing.
PROS: the simplest, cleanest version, but requires you to remember to include photo credit somewhere else near the image (photo credit is required for all uses).