To be fair, and this goes with @fia's point as well, most people probably don't fit neatly into the archetype of 1 of 16, thus it's no wonder there are a lot of mistypes and/or people can't relate to descriptions or don't see themselves in them. The descriptions ARE stereotypes/categories. Some people might be so extreme/obvious that they clearly fit into one and only one, but a whole lot of other people don't fall in as neatly. Add to that the fact that there are about a bazillion ways people determine ones' type, so, it's not like the act of typing is super accurate or there's only one way. It's an incredibly loose theory/set of theories all intertwined and it's a bit of a crapshoot for one to muddle their way through all of the information and varying modes/opinions on typing.