Favourite - Kauto Star in 09. Few reasons, had a big bet in the morning at 9/4, I loved him, wanted him to cement himself in history as one of the greatest of all time, and was desperate for him to gain revenge for the painful defeat the year before. Had also had a decent win on Zaynar in the Triumph that day so overall was one of the best days out racing I've had.
Worst - Denman destroying Kauto in 08 GC, at the time I was horrified at what this upstart was doing to my racing hero. I look back now and recognise it as the best single GC performance I've been lucky to see, and ever will see.