Controlling Epona was terrible, I didn't use her very often in OoT. I had a terrible rage when I was getting the Biggoron's Sword. It took me so long to reach all the goals you were given to get the sword. It made me terribly angry T_T
Getting the Biggoron's Sword. Epona didn't have the best controls of any character you control in the series, and using her was the only possible way, to the extent of my knowledge, to finish the time trials in time to get the Biggoron's Sword.
It took me so long to do everything...it was...