As evidenced by that video, I'd have to say hearing, although I already knew that.
Although I know I must have some kind of hearing deficit, why I consider my hearing weak (considering I have to live in the world) is that there are a lot of things that could, if I couldn't get away from it, or silence it, literally drive me insane.
The music on that video for instance. I had to put it on mute, then out of curiosity, I unmuted it and randomly fast fowarded a few times.
Do people, anyone really enjoy that noise?
I consider most music really nerve rattling, including stuff that's supposed to be soothing. When I do choose to listen to anything, it's for a limited time, like 4 songs max, ususally less, like 1 and a half, before I need to do something else.
However, noises that apparantly bother others don't get to me at all, like if there are workmen nearby, either on the street or in a building. I know they are just doing their job, so why would that bother me? I don't get why someone else in the office or room with me says "OMG, that hammering!" I'm apt to not even register it until someone says something.
I think I'd be absolutely content if I were deaf, as long as I could read lips and knew sign language.