Some flavors just sort of run together into one continuous thing that tastes much better than the gross half. That sort of sweet pear-y peppery spice is tasty, and that blends seamlessly into the alcohol sensations, and then that blends into the spice and bitter of lime/grapefruit and cointreau. I also hate the sensation of being drunk so that's why the flavor matters so much, it's literally the only thing I care about in alcoholic drinks lol

I feel the same way about diet soda, artificial sweeteners all have horrible aftertastes, but grapefruit soda has that little bit of bitterness that melds with it and stops it from sucking.