How many type descriptions have you read

[persimmonism]

I have this niggling thought that in order to truly call myself a socionics enthusiast I would have had to read at least one full type description for each type, the very short ones not counting.
Which made me wonder if other people also don't read much about other types or if it's just me.

Sometimes I read about other types when I get curious about a person I know, but I don't stay for the entire profiles. My knowledge about types is based more on real life observations and knowledge of IE placement.

What about you?
By extension, what have you relied on to inform your knowledge of different types (descriptions, IE, observation, crystal ball, stalking, mulling it over in your head during the night etc)