It depends if you'll be speaking more with Americans or the English. Be practical. Is your goal to move to England or America? To work for an American or English company? To write articles for an international scientific journal (American English)? To be taken more seriously (British English)?

you should speak like them if you want to live there.

For me, it is important because there are so many great films and song in American English

What are your favorite songs and movies Kiriana!

Actually most of the people prefer American English . It's sound good . I like American pronunciation . And most of the people here on this app like American