What makes you think you are the type you think you are ?
Initially the test scores. I test as a 5 quite frequently as well but something in the descriptions just doesn't fit, it doesn't feel quite right. I don't trust test scores that much to put all my faith on them. So, reading up on the 4 and 4w5 descriptions and watching the videos on YouTube and whatever, reading about other people's experiences, I can see so much of myself in there, especially the negative and unhealthy traits (I'm prone to dwell on them more than on the positive sides so that I could help myself learn from them and progress), that it's almost uncomfortable. None of the other descriptions I've read from a multitude of sources fit me quite as much as a 4. Simple as that.
I honestly don't know what my enneagram is. I score similar on 1, 4, 9, 5... I identify with them all on some level, and don't identify with them all on some level as well. I do know that I am sx / sp / so.
As to my actual number? I have no idea. It sort of bothers me that I cannot grasp the necessary perspective.
"It is not length of life, but depth of life." ~ Ralph Waldo Emerson
I know i have to help others, it's innate. Even as a small child i was the same. Weather it's inspiring others, talking/teaching or physical...it's there. I always sided with the under dog except in extream cases of moral wrong doing (in my personal set of morals).
"We knew he was someone who had a tragic flaw, that's where his greatness came from"