I'm the opposite. I realized everybody is really similar at its core. We all have struggles, even though it doesn't look like it on the outside. Also I did a personality test few years ago, and with just answering 52 questions a computer could write a 2 page assay about what I was like. What things I find difficult, what thing I find easy. How I feel about myself. It shocked me how accurate it was. Now I realise that it is only possible if big groups of people are similar.
I presume didn't actually read 20+ essays which were personal summaries of each colleague. But unless you spent a significant amount of time with a psychologist those papers weren't about anyone specifically, they were about lots of us.
Chances are the questions put you in a myers briggs type category and spat out the essay for that category (or a version of). Not to say there isn't a lot of stuff in there that applies to you, but it's not as unique as it seems when you first read it.
People also make them try to fit while reading, and not even just for our own essays. I typically do a version of it annually with work and I fill them all in randomly and end up in odd categories, without fail the whole room tells me that's exactly who I am and it's a brilliant summary, people put so much stock in MB that they force the results to fit their experience.
Having said that, I'm not an expert in personality tests either so what the fuck do I know :)
Yeah I read 20+ of them. And my point is that we are alot alike , so even if there are 100 or even 1000s of different assays and the people reading them can relate to it. That means we are a like , even though you my find them broad. Means we are broadly alike