Sight and hearing are obviously necessary...touch is kinda important and taste is important too (the thought of not being able to taste my favorite foods freaks me out!) so I'll go with smell.
According to Dr. Michael Mann of the University of Nebraska, the glossopharyngeal nerve affects both taste and smell. The olfactory system affects submodalities in the taste buds, hence the change in perception of different flavors.
What a bunch of pussies. Taste and smell because they are easy. If you are going to hit me, hit me hard. I'll lose my sight just to show you bi-hatches how to handle adversity.