Zygarde, try a Sam Adams Stout with roasted chocolate next time. It's got just a hint of sweetness and the roasted cocoa beans impart a smoky, silky tone that smoothes out the bitterness, which is what I think you don't like about Guinness. Personally, I love Guinness, but if I had both the Sam Adams Stout and a Guinness offered to me, I'd choose the Sam's, because it's unique, very tasty, and they don't release it for sale all the time; gotta grab it while you can.