This might be of interest.

[Elkhound]

http://www.medievalists.net/2016/01/31/five-things-medieval-people-would-hate-about-the-modern-world/

[Demercia]

This is an interesting take.  I think mediaeval people would also notice the pollution.  We always think we would notice the smells of the past and I am sure that is right, though people weren't as allergic to cleanliness as popular belief has it, but what about petrol fumes.