I should mention that I'm what's known as "high-functioning autistic". In my case much less "adorkable" than famous TV Asperger's closet-case Sheldon Cooper, and more prone to anxiety and self-loathing.
I'm a bit routine-bound and have thirty black t-shirts and look exactly the same every day. I'm quite happy with this.
I'm whatever the opposite of spontaneous is. I'm not adventurous and I'm mostly an indoors person.
I'm not exactly antisocial, but I find socialising quite taxing.
I am socially awkward and oblivious unless I'm paying very careful attention, which exhausts me.
I have sensory issues and get overstimulated in bright light, noisy places, wind and so on.
I'm a cynic, curmudgeon, nihilist and misanthrope because I am vaguely aware of the rest of the human race and how on Earth could one be anything else in the face of that?