It's not something I get angry about... more interested/amused. Like the examples people have given where an English family has various accents, it'd be like you watching an English film with a family of Americans who supposedly grew up together, but one sounRAB Texan, another is from Beverly Hills and maybe a New Yorker thrown in too.
I can understand most British accents, but sometimes struggle with some strong Scottish or the fast, high pitched Northern English ones.
My accent is more like Hugh Grant, but a bit more 'normal' and without the bumbling.