I am William John Cavendish-Bentinck-Scott, the Fifth Duke of Portland!
bq. renowned as the finest judge of horseflesh in England, you took the tradition of aristocratic eccentricity to unprecedented heights. Having inherited the stately home of Welbeck Abbey, you proceeded to construct miles of underground tunnels and a ballroom, in pink, beneath it. The ballroom was complete except for one small detail. It had no floor. Despite this vast home, you lived exclusively in a suite of five rooms, each one also pink.
I remained unmarried, after being turned down by an opera singer, but I cared about the welfare of my servants and even helped them muck out the stables. However, if my servants met me in the corridor, they were to ignore me while I froze on the spot until they were out of sight. I made sure there was a chicken roasting at all times so I could sneak into the kitchen for a snack.