I would opt to lose my sight. And why? Well quite honestly I believe it's very obvious....what better way to confirm to my lady love that loss of sight does not hinder me from expressing my true feelings to her.
My sense of touch still allows me to explore the wonders of her beauty, and knowing that my sense of smell has not lost the joy of partaking in her lucious bodily scent is a godsend. And how could I be remiss on commenting on the pleasure I experience by my keen sense of taste? I know my ears don't deceive me....my lady love takes pleasure in my delight.
Losing my sight, yes that can be a sad loss....but nothing would hinder me from showing her just how much she means to me.