If the statement that the test says that you are a normal human like everybody else triggers you, that has meaning.
I wouldn't read too much into such a reaction. It seems to be a fairly common thing, resulting in the creation of a uniqueness-seeking scale in psychology. There is some support for a "need for uniqueness" as a human universal, with a review here.
From my notes on the Handbook of Positive Psychology:
As predicted, the students who were told that they were mod- erately similar to other respondents reported more positive moods than did those students who were told that they were either highly sim- ilar or highly dissimilar to other respondents. (page 415)
The establishment of a sense of uniqueness is emotionally satisfying to individuals. Moreover, it is necessary for our psychological welfare. (page 423)
And here's some just-for-fun trivia:
Specifically, evidence of a higher than usual need for uniqueness has been found among (a) women with unusual first names (Zweigenhaft, 1981); (b) women whose nearest sibling is male rather than female (Chrenka, 1983); (c) students who are firstborn or only children versus latter born (Fromkin, Williams, & Dipboye, 1973); and (d) children of interfaith marriages (Grossman, 1990). (page 416)
It seems to be a fairly common thing
The fact that something is common doesn't mean that it's healthy. In general people who are strongly triggered by the assertion that they are normal might engage in behavior that cuts them off from their fellow humans in order to feel more unique.
There are a bunch of people who make uncommon clothing choices and then complain when they draw attention by strangers when walking in public. When I personally walk around in Vibrams (which I got 3 years ago) I do it welcoming attention by strangers.
I have no issues with p...
Have you ever taken a personality quiz/test that helped you have valuable insights? If so, what were the tests and how were they useful?
The only useful ones I've found all yielded the same type of insight. They showed me where I stand relative to others, which is can be genuinely useful since representative samples of large populations can be hard to come by. This includes IQ tests and tests for mental disorders (in my experience, people are usually aware that they are, for example, smarter than the average (although the Dunning-Kruger effect might complicate this) or have some intrusive thoughts and compulsive rituals, but might be surprised to find that they are three standard deviations above the norm or that their symptoms are sufficiently severe to be considered OCD).
No remotely reliable (as in, not astrology) test I have ever seen has revealed genuinely surprising information for a moderately self-aware person, outside of ranking. Furthermore, they rarely gather personality data in a remotely subtle or non-transparent way ("do you like spending lots of time with large groups of people?" "yes..." "surprise, you're an extrovert!"), and thus seem super susceptible to test-takers' attempts to confirm a desired identity.
An example of a more interesting/subtle way to potentially conduct a personality test would be to use question like OKTrends' "do you like beer?" which clusters strongly with "do you have sex on the first date," and, potentially, sexual openness. Such results might be harder for manipulate (consciously or unconsciously) and could assist with deeper self-awareness.
Edited because the first link was broken.