The elderly lady alchemists are very nice and polite, Hafjorg in Riften too. These NPCs always cheer me up with their pleasantness : Amren, Madesi, Roggi Knot-Beard, Brand-Shei, Ulundil (Windhelm stables), Kraldar. I haven't met Scouts-Many-Marshes but a lot of the argonians in Skyrim do seem...