The most common type of information that a website will ask you for is a password, which is unique to that site.
Eye color is irrelevant for sites since there are only about 5 possible colors for human eyes. Most of the time there is no practical use for that information.
Location is mostly irrelevant since your location can change when you visit a site. If it is asking you for it, it's mostly for a special feature unique to that site.
Name is a close answer, but not all websites will ask you for your actual name. Instead, they will ask you for a custum username instead which is different.
