Now if you don't like Guinness, Liz, here's something you really won't like -Russian Stout
My wife always calls Guinness (or Murphys) "Your black bog beer".
Mind, in pubs where they don't look after it right and serve it right, it can taste pretty disgusting. So it's possible you might just have been unlucky, and you might be surprised if you tried it again. But probably not, it's a taste that takes acquiring.
My granny, who ran a pub in Clonmel, thought I needed building up when we went to visit her, when I was a little boy, so she insisted I drank Guinness, and she'd put a big spoon of sugar at the bottom. But I mustn't stir it, so I had to drink it all to get at the Guinness-flavoured sugar, which is a great taste. (Not at all the same as sugar-flavoured Guinness!)