I've noticed that the Bayern accent, or at least the München and Ansbach accents, have a hard roll of the 'R's. In addition, the DW newscast has the occasional R-roll. Yet the two other regions that I am familiar with, Berlin and North Rhine-Westphalia, do not [rather, the speakers that I know from that region emphatically do not -- they've tried to break me of the habit].
My question is, how common is R-rolling and is it pleasing or irritating to most native Germans?