The two are similar, however—and this may sound silly—I have noticed that British people are more likely to dislike American English whereas the Americans generaly don't mind either kind. This might be helpful to know. The important thing is which you like the sound of better—both are the same language, with very minor differences. However there are some things in American English that have slightly different or eiven rude meanings in British English (and probably vice-versa) but this is rare and nothing to worry about.