I voted smell.

Hearing, seeing I definitely wouldn't want to live without.

Touch being gone, does that mean feeling? Because that would mean I could do a lot of horrible things to my body and never know about it which would be really bad. Also...technically, you wouldn't feel and would lose feeling in arms, legs, etc? You would basically be a potato.

Taste is great too. You'd miss out on food which adds a ton to life.

I went with smell. There are a lot of smells I can do without, I'm congested a lot anyway, so I feel like this wouldn't be all that bad in comparison