Hi, welcome!
I can as several other people here relate to many things you are saying.
Especially spending holidays alone. and to not understand why people think I am rude.
The latter has given me alot of uncomfortable situations and abit of anxiety towards social situations, as I percieved myself as a pure and good child, and was hurt when people saw me as mean, or acting in disregard for others.
On my part I do not hate loud music as long as it is pleasant sounds. I like to listen to music in stressfull situations, as it help me to focus on something else than the stress, but I hate sounds like fireworks and baloon popping, and it made me scared when I was a child. I had to work alot to cope with that, especially because of newyears eve and birthdays. One thing I struggle with this day is some people's voices , it penetrates my mind and I cannot focus anywhere else as it takes too much attention, not a pleasant form of attention. It annoys me, and tires me and I often have to pull back and take a break. But I am working on that!
I do not have to count everything, but instead I have to analyze the shapes or structures of what I percieve.(P.ex shapes of buildings and trees if I am sitting in a car looking out the window).
I don't think many would describe you as quirky on this forums, but rather as honest or direct, which atleast I see as a positive trait, since I am better able to understand then. I don't feel safe when I am in a situation I don't understand how to act. Therefore NT's are scary and stressfull, since they want you to act in a way that doesn't make sense , and in addition they tend to try to punish you for not acting the way they think is the most suited.
I also have to apologize for the depth of my reply, but this is how I function, as I like to express myself to a great detail so there is lesser room for misunderstanding!