Of all the traditional five senses, taste is probably the least useful. Sight and hearing are obviously important in most activities, touch is important for knowing when you are on fire or being stabbed (although thermoception may help you out with the former), and smell is particularly useful in the modern era for smelling burning or a gas leak. Taste has its uses too, but in the modern world of sell-by dates and detailed ingredients on packaging, you can probably avoid eating harmful substances without it. Even if it would suck to be unable to taste Pringles anymore, at least you'd be able to earn street cred by easily undertaking a number of dares that would be difficult with a sense of taste.
Of the expanded senses, however, I'd probably choose to lose my sense of balance. I manage without it when I'm drunk.
There are several. Thermoception is classed as distinct from touch. Balance is obviously another that we all (except for you apparently) sacrifice on a regular basis. And the least well known is probably proprioception, which is basically what allows you to touch your finger to your nose with perfect accuracy even without seeing what you're doing. Without that last one, you'd be tripping over your own feet all the time. There are a couple of others too, one to do with acceleration, but I think they're less established. Or at least I don't know what they're called.
They're not actually called expanded senses by the way, that's just how I differentiated them from the traditional five.
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