My favorite nobles are nobles like Count Gottfried von Bismarck, the great-great grandson of Otto von Bismarck. Otto von Bismarck was known for his political prowess, Prussian propriety, and inability to smile. And Gottfried you might ask? For being an alcoholic homosexual who throws parties where people die. Fun.
Then you have the late great Henri Robert Ferdinand Marie Louis Philippe d'Orléans, say that ten times fast, descendant of the last French King and all-around wannabe king. He managed to run through one of the largest fortunes in Europe, disinherit his children like mad in his later years for marring commoners or nobles of too low rank, and after trying to make his twenty-something mistress his sole heir, left his family with these dieing words, ‘I will leave you nothing but hate.’
These are the fun nobles that make you want to revolt against them all over again.