What types of SSI or SSDI cases win?

To win disability benefits (SSI or SSDI), Social Security must believe that your limitations stop you from being able to work fulltime. There is no "best" type of case. Your chances of winning do go up significantly if you have a good medical history (or paper trail) during the time you are disabled. Also, the laws granting benefits are more favorable for people over the age of 50 who cannot do the type of work that they have previously done.