Senseless
If I were to be backed into a corner and informed of this choice, then for me it would be a fairly straightforward thing.
I am sixty two years old and am blind in one eye, so losing the only good eye that remains is a no-no. It isn't the best eye in the world for sure, but it's the only headlight I have so no, I need it.
I need my hearing because without it I cannot work, and if I cannot work then how am I to feed my habit of a new iPhone each time they're updated? Nope, I cannot do without my iPhone, and so I need to work, so my hearing stays.
My sense of touch perhaps? Nope. Sorry, but without my sense of touch then how can I use my Prose app without making a total dogs hind leg of every piece I concoct. Sorry, my sense of touch stays.
And while we are on the subject of senses, I need my sense of taste also. Without my sense of taste how am I to enjoy my vaping? Nope it stays. I guess you kind of know where this is headed...
So then that just leaves my sense of smell doesn't it. Well, you can have it. Every time the dog farts its a nightmare here - take it, and take the damn dog also. Fucking thing sucks. (Joking).