When you are posting about the surgical recover, it would be best under GCS so people can learn about the recovery process. Post operative life would be more for your life after surgery. It also helps to keep all your posts on a subject in a single thread so a reader doesn't have to search the site to find all the posts on a subject. This is more important in the future should you decide to delete you account as it will no longer be possible to view your posts through the profile.