Bad probably, Hp, well they're made for magical healing, so we're assuming some magical ingredients picked for their powers not their taste, roots might give it a gritty aspect, there might be a metallic taste (most potions seem to be blood read) or even a slimy consisty from whatever strange bug juice or whatever is required. The taste may change from potion to potion too, depending on the variation in recipe and ingredient. Mana potions might be a bit different being drawn from natural sources of magic (water from the highest mountain, unicorn urine, etc).