Typically, my English is an american one, slang and all... But when I care for it, I can conjure a british accent and speak in "high English"... Also, when writing (Especially when I write stories) I fancy using "high" English....
My prefered mode of speech is for the most part comprised of words taken from the more exalted resources proffered by the language of the scepter'd isle. but sumtimes i just talk scouse.