Black coffee made from instant coffee is understandably horrifying and tastes like ammonia smells, but have you considered fresh coffee? I don't mean filter coffee, either, the filter paper absorbs all of the tasty coffee oils, leaving only an ashy aftertaste, I'm talking espresso, moka pot, greek / turkish coffee and french press.
Similarly, if you normally find that you hate dark chocolate, perhaps it is because your chocolate is made with slave labour and also not very good.
I am currently enjoying a fine ten year old aged Java. It is very tasty, and I highly recommend.
I think filter coffee taste aight, never thought coffee was delicious but it's pretty decent. I don't like sweet things and enjoy a bitter taste, so I can see why most people don't like coffee
Obviously I prefer dark roasts I'm not a fan of acidic or sweet tasting blonde roasts, bitter is a preferred flavour for me