I've heard of cases of people with Asperger's (though from what I hear, Asperger's has been renamed to simply 'high functioning autism' [which is good because that name's pronunciation was just terrible]) being unable to feel the cold. Perhaps you'll get it back when you're older. Until then, it probably is affecting your sense of taste. On that note, I've heard people with no sense of smell have a strong preference for spicier foods, because food is often otherwise bland.

The sneezing could just be allergies though. Dust or pollen or dry air, who knows. 

That is a very graphic story about your twin. Fraternal, I'm guessing?

If you enjoy historical fiction, I'll direct your attention to Nation RPs. The genre is far beyond me, but sometimes I read over them because every post is so vastly detailed. You do, in fact, play a nation. It's like a freeform game of Risk. A lot of them take place in themed worlds like 1800s or futuristic or one of them had to do with ancient lost civilizations like the Mayans or the Rapa Nui people.

I'm more for low fantasy myself, though I'll dabble in near-futuristic dystopia or far-futuristic cyberpunk for funsies. Perhaps we'll run into each other in the wild, if our tastes ever converge.