I have some sensory issues around crowd noise; she is very much not the hike-in-the-mountains type. Rather than one or other of us having to be miserable, we each do our own thing when they'd otherwise conflict. Easy fix :)
Very excellent. My partner and I do some hobbies separately, but I couldn't imagine throwing a party without him. (Given how few I've thrown, that would be a remarkable event for me.) Sensory issues absolutely make sense as a reason to avoid that, though.
I love and respect the way people with different preferences make relationships work... Power to you both!