If you are asking about which accent sounds cooler, then it all boils down to the personal preference of the individual. But due to the Amercian commercialisation, most countries have more or less experienced the amercian slang. So if you must make an accent, i think making it sounds american is a safer bet.

Hi for me the british accent is the most adequat one since it is more clearer and easier than the American one,however you can turn to the American accent after having mastered the language.

for me , no matter which one i learn or imitate ,both are good. so the situation of mine is probably mixing the british and american sound ,plus eastern elements, lol. it should be said like tri-language together. in short, first try to say english in corrent way then care more about the sounds,thats only for my view, or you can do that simultaneously up to person's ability. the best is you can say it in both accents, and change it at anytime needed. love world language ,that why love saying english lol ,still struggling on the road of learning :D

I like the British accent,but its hard to understand...coming from an American,learning english the American way is best...and that way you learn the slang that goes with it...and on that note...that would be totally AWSOME!!! ( now that is slang for cool ...)

Hello! On personal side, I do like better a Brithis Accent, And as Hesham says, it is more pure than American english. But, an American accent is easier to copy.