I shall briefly turn the question around.
What do Polish people think of the way English, Scottish, Welsh, Irish, American, Australian, Jamaican people learning Polish sound?
English - high brow when RP is used, or most Souther areas such as Conrwales, choppy, almost choking sounds in other dialects
Scottish - I have to listen in for a few seconds to decide whether I'm supposed to answer in English or in German.
American - South States -lazy, somewhat primitive, North intelligible, something I'm used to (Baltimore sounds pretty UK-ish, NYC sounds hilarious to me, kinda like Czech to Polish speakers)
Australian - simple, good hearted :)
Jamaican - that one is a very easy accent since they only use two words; ya man