If you like beer from cask only, not bottle, and you like northern beer, it might be that you like your beer through a sparkler. It's like a tiny showerhead, and the beer gets pushed through at pressure which froths it up and removes CO2 from the body of it, into the head it creates. It gives the beer a thicker mouthfeel, and sweeter, softer taste.
But also, yes, I think American ales (and American-style - Brew Dog, Meantime and Dark Star are UK breweries that make American-style IPAs, off the top of my head) do have a distinctive metallic-tasting hoppiness that can seem quite harsh when compared with even the hoppier end of UK ales. They use different varieties of hops, I know - I'm not sure if there's much more of a difference in manufacture.