Smells: anything artificial, perfume, washing powder, air freshener etc. Gives me a headache/migraine and makes me feel nauseous. Cooking smells, body odour, etc, can be offensive but doesn't give the same headache.
Light: sunlight is difficult and so I always wear a hat / sunglasses. Flickering lights are terrible, but I don't like dim lighting indoors either.
Sound: busy venues with music and lots of people talking. Background tv or radio is distracting and stressful. Generally I need peace and any unwanted sound is an issue - noisy neighbours, people tapping on surfaces, fridges humming, the list is endless really.
Touch: velvet or foam (like the foam filling in some furniture) is horrible and makes me shudder. Unwanted touch is dreadful - hugs even from a friend can be difficult and it can be hard with a partner to find touches I enjoy. Seams in socks are a real bother especially when I am tired when they can be a big problem.
Food: strong tastes, spicy food, textures that are too dry, all difficult.
Heat and cold: I don't seem to regulate my temperature well and feel uncomfortable a lot of the time. Hot weather gives me migraines and I get painfully cold fingers and toes in the winter and cannot physically warm up again after getting cold - I spend hours feeling chilled to the bone even if I am back indoors again sitting under a blanket.
It's a bit depressing writing all this down, really. Feels a lot to have to deal with and for most of my life I was unaware why (late diagnosed autistic). I find it hard to get people to understand and make accommodations; they generally think I am being fussy or exaggerating the difficulties. I'm really not.